I like the crop and the action. My biggest concern with this image would be the overall clutter in the shot. Nothing is really isolated out here. With the ump right on top of the play the motion is interrupted. See how he basically creates a vertical line that stops the horizontal slide? And the batter on deck isn't really adding. Because he's just standing stationary you don't get a feeling that the play was at all close. As you continue with sports photography- look for one element to focus on. Maybe look to get the reaction from the guy on deck. IS he jumping around or what? Wait for the ump to call the play safe or out before snapping. You just need something else to pop this shot up a level. So was the guy safe or not? And if he was- was he playing for your team? :)
Awesome! I'm a baseball freak, and have many times tried to get shots like this, so I know how difficult they are to click at just the right time. You did it PERFECTLY!! Good luck. This is an amazing picture.