It's no wonder Katt Williams got tossed around like a rag doll by a 17-year-old boy ... the kid was a bona fide high school wrestler.
Luke Walsh, who wrestled for Gainesville High, is no stranger to the choke hold in which Williams found himself. Take a look at the pic -- it's easy to see, Luke's a natural as he towers over his opponent.
As TMZ reported ... Luke and Katt got into it during a soccer game, and the jawing continued after the match. Luke got in Katt's face, Katt punched him and Luke took the comedian down.