in 2002. 2004 Athens Summer Olympic Games At the 2004 Summer Olympics in Athens, Crocker received a bronze medal as a member of the 400-meter freestyle relay team, a silver medal in the 100-meter butterfly, and a gold medal as a member of the world-record setting 400-meter medley relay team. Of the three medals he won at the 2004 Olympics, he is best remembered for his silver, as teammate Michael Phelps overtook him at the very end of the 100-meter butterfly to win the race by 0.04 seconds. Traditionally, the Olympian who places highest in an individual event will be automatically given the corresponding leg of the 4×100-meter medley relay for the finals swim. This gave Phelps an automatic entry into finals for the medley relay but he deferred that spot to the world record-holder and swam the butterfly leg in preliminary heats instead. Crocker had swum a slow leg leading off the 4×100-meter freestyle relay final, which may have cost the Americans a better medal, so Phelps' gesture gave Crocker a chance to make amends in a final. Crocker and the American medley team went on to win the event in world record time. (Phelps still received a gold, since he had swum in the preliminary heat of the medley relay.) 2005 World Aquatics Championships At the 2005 World Aquatics Championships, Crocker won a total of three medals, two golds and one silver medal. In his first event, the 50 m butterfly, Crocker won a silver medal finishing behind South African Roland Schoeman, who set the world record. In the final of the 100 m butterfly, Crocker recorded a time of 50.40 to beat his own world record of 50.76 and win the gold medal. Crocker also handed Michael Phelps one of the worst losses in his career when Phelps finished over a second behind. With this win, Crocker was awarded a spot in the 4 × 100 m medley relay. Crocker did not disappoint and swam the butterfly leg in 50.39. The American team went on to win the gold medal. 2007 World Aquatics Championships At the 2007 World Aquatics Championships, Crocker won two silver medals. In the 50-meter butterfly, Crocker won a silver medal finishing behind Schoeman. In the 100 m butterfly final, Crocker finished second to Phelps 50.82 to 50.77. In the heats of the 4×100-meter medley relay, Crocker dove in too early on an exchange,