Some parents are utterly ridiculous when it comes to sports... I, for one, have one of those parents. My dad was (still is-ish) a sports fanatic and he wanted to always coach me in whatever I played - baseball and basketball. Whenever he coached me, it was a terrible experience because if I didn't succeed to his liking, he would always chew me out and I wouldn't want to play anymore. Mind you, this all happened when I was 10 or younger.
I specifically remember one instance where I was pitching (and having a pretty bad time of it). The bases were loaded, he pulled me off the mound, chewed me out in the dugout, and I was so upset from that I ran off the diamond and sat in the parking lot until the game was over. Of course, afterward I got chewed out again and probably spanked for being "disobedient."
The only sport that I ever really succeeded at was soccer because he never coached me (yeah, sorry hammb - it's a sport and a respectable one at that, just give in

). I never had to worry about him getting angry at me. I was actually the best goalie in my league at one point.
Of course, then I found that music was what I should be doing, not sports. Love sports, but it just wasn't what I was best at doing. So of course, I again ticked him off because "singing is for sissies." He eventually wised up and supported me in my endeavors but it would have been nice to have support from the beginning... (Fast forward 6 years and I was announcing sports in high school. Fast forward another 3 years from that and I was broadcasting sports at BGSU.)
I just think some parents need to realize that if their children are succeeding or trying their best, that should be good enough and it certainly doesn't warrant abuse - verbal or physical.