Shane: I'd say there's a general problem with missing faces in most of these images. I know (all too well, believe me) it SUCKS that the glove gets in the way in #1 and the angle just isn't right with #'s 4 and 5, but that's one of the reasons why really good images are really good--everything just seems to fall into place. I'm a fan of shots like your #2, and I like your image. I'm a little less keen on #3, both because I don't think it's a particularly interesting moment in the wind-up, and because I'm not sure you've nailed focus on this one. Sorry to be a downer. You've got a lot to work with here and I'll bet you've got stronger images than some of the ones you've posted.
The exposure seems terrific in these shots. I'm just starting with baseball/softball, can you provide any information on those shots that would help, like camera, ISO, shutter, aperture, etc?