A batting average above .300 is a good thing. Another way to think about it is to be in the top 3-5 for your league in batting average and some other offensive statistics. However, unless you are playing at a high school where colleges come to your games, your best bet to play college baseball is to do well at showcases or in tournaments. In the skills part of showcases, you will need to run the 60 yard dash (under 7 seconds for an outfielder), field balls cleanly, make strong, accurate throws, and have good swings in batting practice. You can't control whether you will get a hit in a showcase or any other game; instead, work on consistently having good at bats and good mechanics. Hitting with more power will come as you get stronger in your upper and lower body. Getting stronger will also help you run a fast 60 and make strong, accurate throws. Good luck!