Results after the jump. It should go without saying that if you don't want anything spoiled for tonight (particularly with regards to swimming), you should skip this post until you've watched the primetime telecast. There will be a live thread for tonight's tape-delayed broadcast on NBC.
For those who want to know how our Cal athletes performed, read on.
Women's 4 x 100 meter freestyle
Natalie Coughlin and Jessica Hardy earned the first medals for Cal of these Olympic games when the United States finished third place behind Australia and the Netherlands for 1st and 2nd place respectively.
Coughlin competed in her only race of these Olympics games, posting the fastest split in the first round heat for the USA at 53.93 seconds (watch it here). Coughlin didn't compete in the final, but Hardy did, and as part of the second leg helped keep the USA ahead of Australia by a few hundredths of a second with a 53.53 second split. Australia and the Netherlands did eventually overtake them, but Coughlin does earn her 12th medal to tie her with Jenny Thompson.
Women's 100 meter butterfly
Dana Vollmer finished with an Olympic record of 56.25 seconds in her first heat, which was the fastest time. You can watch her Olympic record heat here. She stayed on top in the semifinals with a time of 56.36 seconds, which should make her the big favorite going into tomorrow.
Sara Isakovic of Slovenia (59.86 seconds) and Hannah Wilson of Hong Kong (59.59 seconds) didn't make the semis.
Women's 400 meter IM
Caitlin Leverenz just managed to get into the final with an eighth place finish in the heats, then managed a tie for sixth with Stephanie Rice in the final with a time of 4:35.49. Leverenz's strongest event (the 200 IM) is still to come.
Men's 400 meter freestyle
Dominik Meichtry of Switzerland (3:51.34) fell short of the semifinals. Meichtry claims that his favorite event is the 200 free.
Men's 100 meter breaststroke
Neither Martin Liivamagi (1:01.57, 5th in heat) nor Damir Dugonjic (1:00.77, 7th in heat) made it past the prelims.
Alex Morgan had an assist on a Megan Rapinoe goal to help the United States go up on Colombia, and eventually win 3-0. The USA advances to the quarterfinals with the win and will now look to win the group.
Betsy Hassett and New Zealand battled mighty Brazil admirably for 85 minutes before falling 1-0 to a late Cristianne goal.
Women's rowing quadruple sculls
Kara Kohler and the USA boat finished 2nd in their heat behind Germany with a 6:15.76 and will end up in the repechage on Monday.
Men's rowing eights
Coach Mike Teti and coxswain Zach Vlahos finished with the second fastest time with a 5:30.72 to win their heat and advance to the Final A. Olivier Siegelaar (Netherlands) finished third in his heat and ended up in the repechage. Click here to watch the heat.
Men's rowing quad sculls
Elliot Hovey and the United States ended up 4th in their heat and will have to compete in the repechage.
Men's rowing pair
Scott Frandsen and his pair man David Calder led Canda into the semifinal. Check out the highlights of the heat here.