Yeah they both suck. If the Hiney-man is a godlike framer than he would get the call.
Otherwise I think I'd go with Bethancourt. He has some tools including a cannon for an arm and he has some solid Max EV, meaning he can park a mistake into the seats once in a while. He'd be the better pinch runner for Kirk too for whatever that is worth.
Hiney-man is a slap hitter with EVs similar to that of a woman's softball player so he's probably the third C to me.