Olympian champion Michael Phelps has taken on the ambitious task of teaching the Baltimore Ravens football team how to swim.

In a social media video, Ravens Marlon Humphrey, Ronnie Stanley, Kyle Hamilton and Charlie Kolar invited Phelps, a Baltimore native and longtime Ravens fan, to visit their training camp. They said that one in three Ravens players could not swim.

Phelps also toured the smaller pools at the Ravens' facility, and he spoke to the team on the practice field along with former Ravens star Ray Lewis.