Swimming at the 2008 Summer Olympics in the 100 metres butterfly, both set in Sydney, remained Olympic records. Michael Phelps of the United States also broke the record for the most gold medals ever won by an Olympian with a total of 14; 8 of which were won during the 2008 Summer Olympics - this was also a world record. <nowiki>*</nowiki> World record split from the 4 × 100 m freestyle relay Note: At the 4 × 100 m freestyle relay final, anchor Jason Lezak swam the fastest 100 m split (46.06); however, this is not considered an official FINA record, as he did not swim
Puerto Rico at the 2008 Summer Olympics won six medals (one silver and five bronze). The last medal earned by a Puerto Rican was a bronze medal by Daniel Santos at the 1996 Summer Olympics in Atlanta. No medals were won by Puerto Ricans at Beijing. During the course of the 2008 Olympics, 22 athletes represented Puerto Rico—17 men and five women—in eight sports (track and field, boxing, artistic gymnastics, judo, shooting, swimming, taekwondo, and weightlifting). The size of the delegation was 21 athletes smaller than the Puerto Rican delegation that arrived at the 2004 Summer Olympics in Athens, and 58 athletes smaller than Puerto Rico's largest