Michael Phelps challenges McGregor to a swimming race
Phelps asks his 2.2 million strong Twitter following if he should step out of retirement and challenge McGregor to a swimming race.
All of this talk… Should we race as well?? @TheNotoriousMMA pic.twitter.com/l3JoMgb1qT
— Michael Phelps (@MichaelPhelps) August 29, 2017