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

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.