"My son has played since he was 4 and year round for the past 3 years. As for how many games? To many to remember. But, he would pitch anywhere from 2-4 innings a game and then they would want him to catch after that sometimes"
"I think we are going to lay low on game pitching for a couple more years. Coaches won't like it. But he has a ton of talent and I hate to use it all up in his early years."
Let him have fun. Pitching isn't the problem, pitching at that frequency and with that workload is way too much. The rest of the pattern is this, as he gets over this and if he kept up the level, his body would at some point not be able to rehabilitate and he would break down (At 11 they seem to handle it fine (And he hasn't), but let me tell you by the time he's a senior..which is a blink of an eye...he will pay). A new coach may also need to be considered. That is a big load, big time....who does the coach care about here? Who cares about whether they are happy or not, they'd cripple your kid and tell you they are doing you a favor....if they try to tell you what your son suffers from is not an over-use injury...run...and whom would you suppose you trusted to not cause such an injury. I think you should run anyway...but I'm not you.