TAL, here is the problem with leaving it up to parents:
http://www.littleleague.org/learn/newsl ... ssions.htm
This is not an isolated case. There are many parents who do not understand the importance of not throwing too much.
There are many coaches who do not understand this.
There are NOT many governing bodies charged with the task of writing baseball rules who do not understand this. In fact, I'd say they all do because they regularly hear testimony from medical professionals and current/former coaches and athletes on the subject. I trust their findings, and I also accept that any restrictions they set will be at least slightly excessive in the interest of safety. So if that means a 3 minute delay while another pitcher has to come into the game and get the last out, or that pitcher isn't able to... At least I know the rule is well-intended and we're not bending the rules for the sake of winning a high school (or lower level) baseball game.