My son has spent last few years practicing his football throw. He can throw a mean tight spiral. He finally now can hit a wicked fast serve as well. The throwing motion is near identical.
(11 years old. 5"5. 140lbs. Plays defensive end and left guard on his team. Being groomed to be a full back by his football coaches for the high school team. He can't be a ball carrier till high school when the weight restrictions come off. )
Beat top 30 ranked wta pros- leeD