Michael Phelps Joins Baltimore Ravens For Swimming Lessons

Michael Phelps is a man of his word ... 'cause one week after accepting the Baltimore Ravens' invite for some swimming lessons, he delivered!!

The Team USA GOAT met up with several members of the Ravens roster at a local pool on Tuesday ... and showed them the ropes on how to get better in the water.

As we previously reported, guys on the squad asked Phelps for help after taking a dip in the new Under Armour Performance Center recovery pool ... and the diehard Baltimore fan happily volunteered to assist.

Ravens staffer Ryan Mink shared a bunch of awesome footage from the pool day ... including some one-on-one time between the 23-time gold medalist and Travis Jones -- where he instructed the…