The first crop you did is a bit too tight. I like to use standard crop dimension of 4 x 6 or 8 x 10. Remember some simple graphic rules like the rules of thirds and leading, trailing space. On the first one, I would have left a bit more room on left to give more of a sense of where the ball came from. In the second crop, you don't want to be so tight to the ball unless that is the only option. Your original in that case was probably fine.
As you improve on your timing you can get the ball closer than in #1 and get a perfect crop. Also not sure what camera you are using but a higher frames per second (if you can go there) would give you more options of frames to select from.