[mbyron]

Given that you ruled MC, I think you've cited the correct rule and enforced it correctly.

But I'm having trouble seeing how a batter backing out of the box away from the play could be called for MC, especially versus a catcher, much bigger than he, who's charging right at him. IMO merely lowering one's shoulder wouldn't constitute MC -- you'd have to be moving INTO someone with a lowered shoulder.

But that's HTBT, and I wasn't there -- as I say, I'm just having trouble picturing it.

OTOH, I CAN see calling INT here, since the batter clearly hindered F2 by getting out of the box. Intent is not necessary for that call, and from what I'm picturing it would make sense.

One other general comment: every time we see a collision (with or without injury), somebody wants an out or an ejection. Baseball is a contact sport, and if the ball and players are arriving at the same point in space and time, collisions will be unavoidable. I think that these calls are difficult to make in practice, since "train wrecks" by their very nature fail to conform to the usual patterns of baseball that we're accustomed to judging. Not much to be done here other than to gain more experience.