Michael Phelps secured career Olympic gold medal No. 23 alongside Ryan Murphy, Cody Miller and Nathan Adrian by winning the 4x100m medley relay on Saturday night.
The American squad raced to an Olympic record time of three minutes, 27.95 seconds. Murphy broke Aaron Peirsol's 6-year-old world record in the 100m backstroke during his lead-off leg, clocking 51.85 and shaving 0.09 off the old record.
Great Britain, the 2015 world champions in the relay, claimed the silver while Australia took the bronze.
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Phelps said earlier Saturday on a Facebook live broadcast that the race is the last of his storied career. Historically, the U.S. men have won gold in this event every time they’ve entered, dating back to the event’s debut in 1960.
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