I think anti-clutch definitely exists. Players are not robots, they react differently in different situations. It's human nature, some will tighten up and get stressed in clutch situations. However, that doesn't mean the opposite is true. Do some hitters actually focus better in big situations? If so, are they slacking the rest of the time? I don't think anti-clutch proves the existence of clutch, though. Anti-clutch existing proves the existence of clutch if you are assuming the definition of clutch is performing up to the statistical average/personal ability of the individual. I would use golf as an example of this. Let say you were a good golfer and were able to go to a driving range and hit it a driver straight at will and place the ball where you wanted. Would you consider that clutch if that person was able to take that ability onto the golf course and play a round by himself and be able to drive the ball well. Probably not. This is because there was no pressure. Now let’s say he was playing in some tournament and was able to continue to hit perfect drive after drive. You may now consider this guy clutch now that it is during a pressure situation and the guy continues to perform. Exactly..the stats show that as a whole, performance goes down in these key situations. It is obvious why this is-the other team's pitcher bears down, relievers are brought in to face one batter, and other things set up the batter to fail. If you can maintain your production in these situations, that can certainly be defined as clutch. At the beginning of the game, everybody gets to face the same guy. With the game on the line though, the left hander who is devestating against left handed hitters comes in, and it's the job of that hitter to get a hit anyway. If you can take a teams best punch and still stay the same type of hitter, you are clutch.