We wonder why so many guys are blowing out their arms. The science is pretty simple.
I can guarantee you if I ran a team (club/travel, school, etc), my guys wouldn’t be throwing year round. They may not get as much practice but they’ll have a better chance at staying healthy.
Heck, even the pros give their arms a rest for a few months, and they’re fully developed athletes who compete at the highest level.
http://www.philly.com/philly/blogs/sportsdoc/Should-baseball-players-kee…