Felice Herrig has turned her tootsies into cash cows -- the combat sports star tells TMZ Sports she's raking in the dough ... by selling her used socks and pics of her feet on OnlyFans!!
Yep, you read that correctly -- the newly-retired MMA fighter and current Bare Knuckle FC fighter tells us she's living very comfortably by snapping shots of her lil bulldogs ... and it's now given her the freedom to fight at her leisure.
Felice tells us all her fans with foot fetishes have asked for some up-close looks for a while now .