This seems to occur more often in middle school. We've had to have Rick Bowden check out some 8th graders to see if they are too mature for sports a few times in football. He has never denied a kid the opportunity that I know of.

When I was in High School I had to wrestle a monster named Ron Turley, and many people speculated on his age. He was as physically mature as any senior I've ever seen.

If I had a son, I'd make sure he started school as late as possible. The longer he had to mature, the better chance that he'd have to reach his full potential in H.S. and college. Of course, I was "blessed" with 3 girls, so I'll never have to worry about it.