It's a cute idea, but one of the players wanted a wrestling-style character and I talked him out of it. The rules don't support grappling, and though I guess you can reskin it any way you want, mechanically you're just punching every round, and describing it as a hold, which doesn't feel right for me. I just doesn't sit right with me to base a character around a concept the rules don't reflect.
The closest thing to it that I've seen is the Archaeologist's 'Pin' talent, which is a neat trick for a high Athletics character.
If it were me, I'd suggest the player go for something in-universe like a ShockBoxer, which has the right martial/entertainment feeling I think.
Edited by Maelora