Most studies conclude that there's not much clutch hitting ability. But I have read a couple that say anti-clutch may exist to some degree. Also, wrt the whole RISP thing, I wouldn't define clutch by a garbage time at-bat with some dude on 3B. Maybe WPA for hitters will actually turn out to be good for something. Anyway, it doesn't make much sense that a player can leap to a whole new ability level when the game is on the line. MLB players have a finite number of at-bats every year, and from a self-interest perspective, they are all important. When I played, I cherished every official at-bat, because you really don't get all that many of them. I can buy that a pressure packed situation may effect a few players negatively, but I find it hard to fathom that there are a bunch of players that have a switch that they only flip on every once in a while. For instance, they should probably switch it on and duct tape it to the wall during their pre-FA years. I could link a ton of studies I guess, but intuitively, some amount of anti-clutch makes much more sense than clutch. Like I said earlier, if there's some extra skill that a guy on my team has, but only taps into sometimes, then I don't think that's actually a good thing. It's not like basketball (or even pitching) where you are playing for an extended period of time and there probably is coasting and raising your game involved. You get five a night if you are lucky.