First off, I'd like to say...I love the fact that she's wearing two different color socks. I used to do that when I played softball (and basketball, sometimes) and people made fun of me for it. Hahaha.
In the first shot, it would've probably looked better if you were on the other side of her.
I like the second shot, except the ball is missing. Don't you hate when that happens?
In the third, it looks like your focus just missed her. The background is more in focus.
The fourth is good, but her glove is covering a tiny bit of her face.
The fifth is my favorite. When I take softball shots, I try to capture that exact moment in the wind-up.