Marlon Humphrey and other Ravens want to learn how to swim. Luckily for them, they landed the best teacher available: Michael Phelps.

Cornerback Marlon Humphrey posted a video on social media asking 23-time Olympic swimming champion Michael Phelps — a Baltimore native — for swimming lessons. The video includes Humphrey, tackle Ronnie Stanley, safety Kyle Hamilton and tight end Charlie Kolar standing in the pool.

Michael Phelps, the most decorated Olympian of all time, certainly knows a thing or two about swimming techniques.