I use Sony Vegas Pro but it is quite expensive. You can get Sony Vegas Movie Studio for around $100 and it is a very good editing program. Pinnacle is quite popular as well and there is always Windows Muvee Maker which comes installed on alot of machines these days.
You don't need an $800 program (Vegas Pro) to make a baseball highlight reel. Coaches are just wanting to see the player, not over the top editing skills or graphics.