I am a freshman pitcher and have some velocity issues, but am not sure why. I'm a lefty that throws at a sidearm angle which I understand takes off a little bit of velocity from throwing over the top. My pitching is similar to Orioles pitcher Donnie Hart(link below). I've always wanted to go to college and eventually to the pros, but my fastball has always been a little bit below average. My fastball velocity is usually between 60-65. I also have a cutter, slider, and changeup. Any suggestions that will help me to gain velocity on my fastball? Thanks.