They won't. And, yet, many will say they do. And very few (likely close to none) will actually reflect on their own injury rates and consider whether they are doing enough. This is a Californiacentric bulletin board and whether one is in NorCal or SoCal, we are all pretty close to some of the best medical resources in the country/world, some of the top researchers and practitioners in the area of pediatric orthopedics. Why don't more clubs/high schools tap into those resources and provide hands-on, daily, injury prevention programming? We know coaches never want to give up the precious additional 20 to 30 mins that can save kids from many months of rehab - even the clubs that do something, might have a weekly session that is not taken all that seriously when, as we know, this is a daily thing that needs to happen. (when I coached travel baseball, I'd bring out people from Children's in Oakland to work with my kids on dynamic warm-ups, elbow and shoulder injury prevention, etc. It was worth it to do a pre-season throwing program to help prevent injuries rather than a return-to-play program following Tommy John surgery (which, like ACL for girl soccer players, is epidemic among boys in throwing sports).
Deep breath . . .