Thanks Lodi! A braggng update ... Southpaw_son's team won the tournament, and he threw 5 scoreless in the Championship game against a very good hitting FL team. About the time they began trying to take his tailing 2-seam the other way, he started cutting it in on the righties, and they swung over it, or dribbled it to SS.
The moral of the story ... Learning to throw more than 1 Fastball is a very powerful tool for a Pitcher.