Boxer Ashley Theophane -- Damn, This Water's Sooo Cold! 'Money Team' Clowns Him (VIDEO)

One of Floyd Mayweather Jr.'s protege's just made a crucial mistake by showing weakness ... in the locker room -- and now the Money Team is piling on the dude.

Ashley Theophane ended a workout by climbing into a cold tub, and whined like a bitch while doing it. That was his first mistake. The second was allowing someone to record the session ... because now it's all over social media.

Theophane's teammate Ishe "Sugar Shay" Smith called him out, saying ... "Wow this guy is embarrassing." It's just a matter of time before Floyd joins the fun.