Mark Stubblefield worked 12 years with Minor League Baseball after earning his Master's Degree. He is now the medical coordinator for the health care of 230 minor league umpires in 45 different states.
His top skill if you want a job similar to his: Communication and Network.
Low back pain is one of the most common issues they treat but they do a functional movement screen on each umpire at the beginning of the year to focus on preventative medicine.
They also recommend the nutty buddy for important protective equipment
Thanks Greg Evans for getting me in contact with Mark.
Year round organized sports are too much for young kids. If the professionals don't play the same sport 12 months a year then why would you ask a 12- 18 year old too? Listen to the stats and let your kid rest.