I don't have anything to say technically about these, but 'artistically' (i.e. composition) I think they just miss the mark.
On the first one, you've got a lot of potential drama in #3's face, which would suggest that a tight crop might be in order. However, his arm blocking out the defender's face detracts from the image. If you shot this as a sequence in burst mode, maybe one a little bit before this would have been better.
Number two, the two main players seem a little disjointed to me - like they don't really have a strong connection with each other. The other players in the background also add to the clutter. In fact, the way things are sitting right now, it looks like you're using the shooter and defender to frame #15 - like he's the subject.
Again, I think I'd like to see something zoomed in a little bit more, and something more 'frontal'.
Take my comments with a grain of salt because I'm not sure I'd have been able to follow my own advice.
Also, even though I haven't really done any sports photography, I'm guessing that even when you set yourself up in a perfect spot and anticipate everything that's going to happen, that there are probably a lot of great shots you don't get just because you're still in the wrong place.