a time of 3:52.36, better than three seconds ahead of second-place finisher China. Swimming the butterfly leg, Vollmer had a split of 55.74. The final time of 3:52.36 for the medley relay was the second-fastest mark of all time, just behind the Chinese-held world record of 3:52.19. 2012 Summer Olympics At the 2012 United States Olympic Trials, the U.S. qualifying meet for the Olympics, Vollmer qualified for the U.S. Olympic team for the second time by finishing first in the 100-meter butterfly and third in the 200-meter freestyle. In the final race of the 100-meter butterfly, Vollmer won in a time of 56.50 seconds, better than one second ahead of second-place Claire Donahue. In the semi-final, Vollmer had broken her own American record of 56.47 with her time of 56.42. Vollmer also competed in the 100-meter freestyle, but just missed a spot on the 4×100-meter freestyle relay by finishing seventh (54.61). At the 2012 Summer Olympics in London, she again broke her American record and set an Olympic record with a time of 56.25 seconds in her 100-meter butterfly qualifying heat. In the 100-meter butterfly final, she won the gold medal and set a new world record with her time of 55.98. Vollmer also competed in the 4×200-meter freestyle relay. She swam the second leg with a time of 1:56.02, as the U.S. team won gold with a time of 7:42.92. In her final event, the 4×100-meter medley relay, Vollmer won another gold with Missy Franklin, Rebecca Soni and Allison Schmitt. Swimming the butterfly leg, Vollmer recorded a split time of 55.48, as the U.S. team set a new world record with a time of 3:52.05, bettering the previous record of 3:52.19 set by China in 2009. 2016 Summer Olympics At the 2016 United States Olympic Trials, the U.S. qualifying meet for the Rio Olympics, Vollmer qualified for the U.S. Olympic team for the third time by finishing second in the 100-meter butterfly. In the final race of the 100-meter butterfly, she swam a time of 57.21 seconds, finishing behind Kelsi Worrell. Vollmer also qualified for the 4x100 meter freestyle relay by touching sixth in the individual 100 meter freestyle. At the 2016 Summer Olympics in Rio, she won a bronze medal in the 100-meter butterfly with a time of 56.63. Vollmer also competed in the 4×100-meter freestyle relay the same night, in which she swam the third leg with