From the Critique Club:
Okay, this is a sports action shot and as such we are at the mercy of the available lightand of course the swift movement. The image has pleasant colors, but contrast needs a boost. The image is not in dead focus.
Of course, the dynamics would change in your favor had you waited to catch him at the end of the swing. This would have added more excitement. As a matter of fact many sport photographers shoot this on drive mode.
Another thing you can do with this picture as is, is to crop it like a baseball card.
The one lesson you should learn from this effort, is to resolve the focusing aspect. Learn the knack of prefocusing and then waiting for the action, but if much movement takes place do not hesitate to refocus.
By looking at your port I can see that you are well capable of focusing your camera, so all you need is a couple more visits to the arena. You will learn that a different mind set is required for different situations.
This goes in order of what I notice first:
1) Boost the colors a bit by adjusting the contrast, it seems really dull, although I know paper photos can be, they don't have to be.
2) Rotate a bit to make the line of the box parallel to the bottom edge, it just seems like he's ready to fall backwards.
Score: 5