Lies, Damned Lies, and Cal Football Stats
Twist will have an Inside the Numbers Post on Arizona State tomorrow, but now that we're over halfway through the season, I felt it was time to take a look at some of our own stats. AERose started it off with 1st quarter D vs 2nd quarter D, and there are plenty of other good stats to crunch. We know numbers can lie all the time, but do they lie to us about our own team? And what do you guys think they portend for the final stretch of the season?
Let's take a look. Ponder the questions in the comments. (All numbers from cfbstats.com!)
1. Tied for 9th in the country with 22 sacks.
Now looking at that, you might say, "Wow, Bob Gregory is creating pressure! Maybe I was wrong about our defense not getting to the quarterback!"
Of course, no one is saying that, with some merit. Half of those sacks came against Washington State and Maryland, two of the worst teams in the country. There were 2 sacks against USC and Oregon combined and 3 per game in the other three games. Our pass rush isn't as impressive when you strip it down.
Turn it around though: Who exactly has anyone else played to pile up those sacks?
Pitt, the leading sack-leader has 33, but 16 came against Youngstown St, Louisville and Buffalo. Cincy is #2 with 29, but 10 of them came against winless Miami (OH). USC had 13 of their 29 sacks against Wazzu and San Jose State, Penn State had half of their 26 against the powerhouses of Akron, Eastern Illinois and Temple. So many of the teams ahead of us are also getting the benefit of the doubt from piling up on patsies.
Is our pass rush as good as those 29 sacks indicate?
2. Tied for 5th in the country with turnovers lost (6)
Kevin Riley may do a lot of things wrong, but he doesn't throw backbreaking interceptions (well, except for that one against USC, but...). Riley has only two picks this season and nine overall in his career, and given his current throwing tendencies it'd be hard to see us changing it up.
This is a stat that worries me though, because there's generally a regression to the mean. No matter how much Riley tries to not throw picks, he's going to eventually throw them. And although we haven't fumbled as much as previous seasons, I've always felt fumbles are totally left to chance. With five games left, there's still plenty of dice left to roll.
Are the Bears good at holding onto the ball? Or are we about to regress to the mean?
3. Passing defense FAIL (113th in yards given up, 102nd in completion percentage, 87th in passer rating, 85th in yards per attempt).
No use sugarcoating this one. Our pass defense has been bad. However, are there some stats out there that could give Cal fans hope?
I dug through cfbstats.com and found two.
1) 31-57, 54.4 completion percentage, 339 yards, 0 TDs, 5 INTs, 86.8 passer rating. No, that wasn't Kevin Craft's statline against us last year, that's Cal's 4th quarter passing defense. We've given up zero passing touchdowns in the second half and had five picks! Very promising, considering the games we'll be playing probably will be closer than the ones we've played in. Or it could mean Cal knew the pass was coming in every game. Umm, go double digit leads!
2) 42.9 completion percentage in the red zone. Opposing quarterbacks light us up...until we get to the red zone. It's pretty much a carbon copy of the 2006 defense, which let offenses throw all over the field on us, held up inside their territory, forced a field goal. Not pretty, but if you're trading touchdowns for field goals (like against UCLA), you're happy to live with that.
Does this give you hope? Or do things need to improve drastically?
4. Running offense GREAT--4th in the country in yards per carry, 15th in yards per game.
For what seems like the thousandth year in a row, our running game seems to be heading to a top 15 finish nationwide. Jahvid Best and Shane Vereen have become another one of those great Gould-tutored running back duos that we'll happily reminisce over in the years to come.
However...Oregon: 32 carries, 77 yards and USC: 25 carries, 86 yards.
These middling performances against good defenses has to be sobering. Although a lot of fans would say something stupid like "Ohhh Best and Vereen aren't BIG GAME BACKS BRAH!", I go the other way and point at the offensive line. The run blocking isn't as strong as in year's past (how could it be with Ta'ufo'ou, Mack and Malele all gone?), and that the running backs are left to do a lot more on their own. When they face good defenses they get stuffed. So the question is--are the rest of the Pac-10 running defenses good or bad?
Is the running game stronger or weaker than in previous seasons?
5. What do these quarterback numbers mean???
This wouldn't be complete without a discussion of Kevin Riley, would it? Let's break it down.
Most promising stat: In situations where the Bears are not getting pummeled (down by 2 touchdowns or more) and the defense isn't totally out there expecting the pass, Riley is a modest 84/137, 61% completion rate. The Bears aren't likely to face many two+ touchdown deficits the rest of the season unless things go horribly, horribly wrong.
Most discouraging stat: Riley continues to be a slow starter. He's thrown 4 touchdowns in the first quarter but only completed 47% of his passes, putting Cal's first quarter passing offense at 115th in the country. It's no wonder teams continue to load the box against us--you'd take a 50-50 shot rather than letting Best or Vereen go for eight-twelve yards, right?
Most intriguing stat: Strangely after one quarter, Riley puts everything together--65% completion rate, 5 touchdowns, no picks, 159 passer rating in the second quarter leaps Cal up to the top 25 in passing offense for that period.
Most obvious stat: Riley becomes a more accurate quarterback the bigger the Cal lead becomes: 53% in a tied game, 61% in a touchdown game, 63% in a 8-14 point game, 67% in a 15+ point game. Running game, defense, we need you to get those first points for us!
What to make of those quarterback numbers? What encourages you and what discourages you?
Other interesting stats--draw your own conclusions.
6. Penalty-free (11th in penalties per game, 24th in penalty yards per game): The Bears have generally been a clean team in this regard, and they certainly haven't false-started on every snap like Wazzu was doing last week. Of course, Halloween in Tempe would be the ultimate barometer, since I'm sure there will be plenty of Sun Devils trudging the field starting all sorts of nonsense.
7. Kickoff return coverage 57th in the country, punt return coverage 96th in the country, punt returns 38th, kickoff returns 30th: I wonder what those stats looked like pre-Wazzu. Hopefully something that doesn't leave me shaking my fist toward the sky screaming "ALAMAR!!!"
8. 98th in time of possession. God, we must suck on offense. We can't hold onto the ball! Wait, what? 10th in scoring offense? And that's after two offensive no-shows? Umm...don't we still suck on offense?
9. 39th in 3rd down conversion defense, 21st in 4th down conversion defense. Gee, our defense doesn't look so bad after looking at those numbers.
10. 60th in 3rd down conversion offense, 112th in 4th down conversion offense. Blech.
0 recs |
27 comments
|
Comments
I just have one comment on (1).
I believe it is overly punitive to qualify the sack numbers because many of those sacks came against patsies. I would argue that most teams also have one or two patsies on their schedule, except maybe the patsies themselves. Everyone in the Pac10 for example plays WashSt, but even WashSt played Midwestern Idaho or whatever. Basically, since most teams play against doormats, beat them soundly, then rack up big numbers, it’s still probably kosher to compare their enitre records against each other—without qualification.
by since1997 on Oct 29, 2009 10:48 AM PDT reply actions 0 recs
I agree, though it is also instructive to look
at where the big numbers come from. i.e., how are we against the decent teams as well as the total.
Go Bears Go
by Rocksanddirt on Oct 29, 2009 10:50 AM PDT up reply actions 0 recs
I would agree with this totally…if this were the NFL, where it all evens out. Unfortunately college football is so full of inefficiencies it’s hard to measure whether Cal and Pitt are piling up the sacks against opponents of equal quality. Some teams have far weaker schedules than others.
Example: Oklahoma has 25 sacks, but they got 4 sacks on BYU, 4 sacks on Miami, 4 sacks on Texas, which is very impressive. The 2 sacks we amount against Oregon and USC, less so.
You do raise a good point about doormats though—maybe we should find a way to measure sacks versus quality of opponent? I’m not really sure yet.
Email: bearsnecessities@gmail.com
by Avinash on Oct 29, 2009 11:05 AM PDT up reply actions 0 recs
I'm intrigued by # 3
Specfically, subsection (1) re: second half passing numbers. Indicative of adjustments at halftime?
So does this mean that if we have a lead late in the 4th quarter, the defense on the field, and the opposing team needing a TD to tie or win, we should feel like we have ’em right where we want ’em?
I’ve been one of those in the “our pass defense sux” camp, but I must admit I am encouraged by the stats in # 3.
Praise be to Tedford!
by Ohio Bear on Oct 29, 2009 11:09 AM PDT reply actions 0 recs
Not sure if it’s halftime adjustments, just 4th quarter adjustments. Cal isn’t very good in the 3rd quarter (99th in passer rating D in the 3rd q., T-114th in completion percentage D).
Email: bearsnecessities@gmail.com
by Avinash on Oct 29, 2009 11:18 AM PDT up reply actions 0 recs
Penalties
11th in penalties per game, 24th in penalty yards per game
So basically, we’re generally clean. But when we commit penalties, we commit the big kind: personal foul, PI, etc.
Pac-10 stats are similarly disparate: we are 1st in penalties in terms of number of fouls but drop to 2nd in conference in terms of penalty yardage.
Praise be to Tedford!
by Ohio Bear on Oct 29, 2009 11:16 AM PDT reply actions 0 recs
Interestingly, Cal’s committed 14 penalties the last two games, so the number was actually better for those two.
Email: bearsnecessities@gmail.com
by Avinash on Oct 29, 2009 11:21 AM PDT up reply actions 0 recs
*before those two
Email: bearsnecessities@gmail.com
by Avinash on Oct 29, 2009 11:21 AM PDT up reply actions 0 recs
Pac-10 stats
Link to Pac-10 stats in case anyone is interested.
Praise be to Tedford!
by Ohio Bear on Oct 29, 2009 11:16 AM PDT reply actions 0 recs
And although we haven’t fumbled as much as previous seasons, I’ve always felt fumbles are totally left to chance.
Should correct this a bit — fumbles aren’t based on luck, but fumble recoveries are. We’ve fumbled 11 times, which is pretty good, but only lost 4, which is a bit lucky. (By contrast, our opponents have fumbled 10 times and lost 8.)
by sycasey on Oct 29, 2009 11:24 AM PDT reply actions 0 recs
Whether 4/11 is lucky or not depends a ton on what kind of fumbles you're talking about
Eg bad snaps are recovered by the offense the overwhelming majority of the time (albeit costing a down and a few yards), while wide receiver fumbles are usually recovered by the defense.
Linda's in the cold ground, won't see her anymore
Somewhere out on the highway tonight, the drunken engines roar
It's just one of those things, one of those things
-- Al Stewart, "Accident on 3rd St."
In memory of Nick Adenhart and all victims of drunk driving
by PaulThomas on Oct 29, 2009 4:58 PM PDT up reply actions 0 recs
True, I haven’t gone through every fumble with a fine-toothed comb. Ohio Bear makes a good point that at least two of the “lost” ones are covered by the punt that bounced off our guy’s helmet against Minnesota (not really a fumble, in the strictest sense) and the fumble that we recovered and then fumbled back against Oregon.
I don’t recall us having many “pure” fumbles (as in, the RB gets hit hard and loses it, or the WR gets stripped after catching the ball), outside of Riley losing the ball on a sack a couple of times and our OL being fortunate to recover.
by sycasey on Oct 29, 2009 9:54 PM PDT up reply actions 0 recs
Turnovers: we are who we are
Are the Bears good at holding onto the ball? Or are we about to regress to the mean?
With 7 games played, I think it’s safe to say (cautiously) that we are good at taking care of the ball. I think it says a lot that we didn’t give the ball away with reckless abandon in the debacles against Oregon and USC (save for the one fumbled handoff exchange at Oregon). If we weren’t going to give it away in those games, then we’re prolly just not the type of team that gives it away very often.
Of course, that could change in an instant if we’re not careful. But since we’ve shown few signs of being careless with the ball, I expect us to be a solid turnover margin team all year.
Another thing to bear in mind in the “turnovers lost” category: 2 of those were fumbles by special teams (Satchell vs. Minny; SQT vs. USC) and one was a fumble by the defense on a fumble return (Hill vs. Oregon). Our offense has turned it over only 3 times (fumble vs. Oregon; INT vs. USC; INT vs. WSU).
Praise be to Tedford!
by Ohio Bear on Oct 29, 2009 11:26 AM PDT reply actions 0 recs
There have been a few times where Riley has fumbled on a sack and we were lucky to recover (definitely once each against Maryland and Oregon), but otherwise I don’t think we’ve given many opportunities for turnovers. So there’s a little bit of luck, but also we are good at holding on to the ball.
by sycasey on Oct 29, 2009 12:00 PM PDT up reply actions 0 recs
discrepency in the numbers?
first off, very interesting stats! but then I looked at the sacks ranking, and I seem to have remembered Cal being even better. I normally use the ncaa stats here: http://web1.ncaa.org/football/exec/rankingSummary?year=2009&org=107 which has Cal’s sack total at 26.0, 3.71/game, or 4th in the country. If you look on the cumulative season statistics link at calbears.com, the total is 23.0 sacks: http://www.calbears.com/sports/m-footbl/stats/2009-2010/teamcume.html
which numbers do others trust the most?
by ttgiang15 on Oct 29, 2009 12:26 PM PDT reply actions 0 recs
3rd Down stats bother me
3rd and short? Fine, we are converting 14 of 21 rushing (although that number might be a bit too low for my liking) but 5 of 5(!) passing.
After that, though, it gets ugly really fast.
3rd and 4-6 yds: We’ve converted only 1 of 4 rushing. Passing, we’re 10 of 20, which isn’t great but decent. Interestingly, we have 11 of 20 completions on 3rd and 4-6, and 10 have gone for a first.
3rd and 7-9? No first downs rushing in 4 tries, and only 3 of 11 conversions passing.
3rd and 10+? Again no first downs rushing in 6 (! give-up draw plays?) attempts, and only 2 of 22 passing.
So for 3rd downs of 7+ yards, Cal is only converting 5 of 43. That’s HORRIBLE!!!
If the Bears aren’t able to make positive gains on 1st and 2nd down, they struggle…
by Oaklandishbear on Oct 29, 2009 12:35 PM PDT reply actions 0 recs
Yeah staring at those stats really bummed me out. At least with Longshore you had hope you’d convert a 3rd and long.
Email: bearsnecessities@gmail.com
by Avinash on Oct 29, 2009 12:40 PM PDT up reply actions 0 recs
I’m sure that’s worse than what we should expect, but isn’t the dropoff in 3rd down conversion% supposed to be huge after you start getting into 3rd and 6-7+?
by Missing Barry on Oct 29, 2009 12:44 PM PDT up reply actions 0 recs
Hmmm...these are the stats for passing downs, draw your conclusions
3rd and 1-3:
2006: 9-16
2007: 7-17
2008: 4-9
2009: 5-5
3rd and 4-6:
2006: 11-30
2007: 20-34
2008: 11-31
2009: 10-20
3rd and 7-9:
2006: 9-20
2007: 12-37
2008: 4-27
2009: 3-11
3rd and 10+:
2006: 16-51,
2007: 7-38,
2008: 10-46
2009: 2-22
Email: bearsnecessities@gmail.com
by Avinash on Oct 29, 2009 12:53 PM PDT up reply actions 0 recs
Agreed, but consider:
StanfUrd is a collective 15 of 51
Arizona is 9/36
U$C is 10/44
fUCLA is 12/57
and interestingly,
Oregon is 8/48
I’d expect Cal to be closer to 20-25%…
by Oaklandishbear on Oct 29, 2009 1:01 PM PDT up reply actions 0 recs
Just letting you know
I hold per play statistics in higher regard than game-by-game stats. ESPECIALLY on defense. Our D has seen a ton of plays… which doesn’t bode so well for the end of the season
STAY THIRSTY, MY FRIENDS
by Thoroughbred on Oct 29, 2009 12:44 PM PDT reply actions 0 recs
Shouldn’t you factor in how many of those plays have been in blowouts? The second stringers probably played a lot more in those instances.
Email: bearsnecessities@gmail.com
by Avinash on Oct 29, 2009 12:46 PM PDT up reply actions 0 recs
Riley statistical update
Here is a continuation of my series of posts applying naive statistical analysis to Kevin Riley, which treats pass completion rate and yards per pass as random variables with constant mean.
68% CL error bars are computed using a binomial distribution for percentage and standard deviation in the mean for YPA. For comparison, I have correlated the results with the current NCAA ranking for FBS QBs.
Completion percentage
Season 54.1+/-3.7 (NCAA rank 99)
Non-Conf 64.8+/-5.7 (rank today would be 21 if that were his season avg)
P10 47.3+/-4.7 (dead last!)
Yards per pass attempt
Season 7.9+/-0.9 (NCAA rank 29)
Non-Conf 9.8+/-1.5 (number 1!)
P10 6.8+/-1.1 (80)
Unsurprisingly, it is a tale of two seasons. The significance of the difference between Non-conf and P10 games is +2.4sigma for completion percentage and +1.7sigma for yards per attempt. This leaves only a little room for good/bad luck to explain the difference, with the natural explanation obviously being that SOS is very different for the two samples. With the benefit of hindsight, we observe that the Non-Conf average would not have been a good predictor of season averages, since SOS was so much worse. My naive model was simply too naive to have predictive power.
However, the current season average may well integrate into an average SOS comparable to the rest of the schedule, so the season average thus far might be more safely extrapolated into the future. Assuming that, it seems unlikely, at >68% CL, that Riley is an unlucky 60% (NCAA rank: 55) passer for the whole season, who will regress upward toward his mean. And he is not likely a <50% lucky but intrinsically awful passer either. My prediction is he will complete the season somewhere between average and awful.
Pessimists could instead extrapolate the P10 Riley as the “true” Riley; that poor hypothetical soul will be lucky to break 50%. The statistical drama, to coin an oxymoron, is to see if Riley will finish the season as a mediocre passer or an awful one.
by the bear facts on Oct 29, 2009 2:08 PM PDT reply actions 2 recs
Can I just make a general comment here?
A lot of this is interesting, but a lot of it is also observations drawn from extremely small samples of play. [There are some major correlation/causation issues, too.] I think you could tighten things up by reducing the use of things like quarter-to-quarter splits, which are basically useless except as bad proxies for other variables.
Given a hypothetical defense that has been very bad except in the fourth quarter and good in the fourth quarter, the odds are much higher that it is just “bad all the time” than that it is really very bad except in the fourth quarter and good in the fourth quarter.
Linda's in the cold ground, won't see her anymore
Somewhere out on the highway tonight, the drunken engines roar
It's just one of those things, one of those things
-- Al Stewart, "Accident on 3rd St."
In memory of Nick Adenhart and all victims of drunk driving
by PaulThomas on Oct 29, 2009 5:07 PM PDT reply actions 0 recs
I dunno, there’s about 50-60 attempts per quarter, that’s a fairly large sample. Although I do get what you mean by the fourth quarter good/rest of quarters bad probably means pass defense bad most of the time.
Email: bearsnecessities@gmail.com
by Avinash on Oct 30, 2009 9:34 AM PDT up reply actions 0 recs
Very interesting stats. Especially those on the pass defense. A lot of yards given up via the pass, however, not a lot of points (outside of Oregon). Good job of holding onto the ball. Though it would be great for the defense to create a few more turnovers.
That being said…. the most interesting statistic was this one:

Nice find!
by MBT91_78 on Oct 30, 2009 7:02 AM PDT reply actions 0 recs





























