Most number of Olympic swimming events – 29
Phelps has also broken his own record of the most number of Olympic swimming events that an athlete has competed in. Since his debut as a 15-year-old at the 2000 Sydney Olympics to the 2012 London Olympics, Phelps had participated in 24 events.
At Rio, Phelps has already participated in four more – the 4x100 meter relay, the 200 meter butterfly, the 4x200 meter relay and the 100 meter butterfly. This puts his present total of events at 28.
However, he is also set to participate in the 100 meter butterfly in the next 12 hours. So, when Phelps gets up on the plane to Baltimore after the games, he will still be the American swimmer who has participated in the most number of events in history. Only, his renewed tally will read a whopping 29.