AA 6-8 yr olds – This is a machine-pitch level. Outs are counted, and while the score is not counted, an inning will end after 5 runs.
AAA 9-11 yr olds – Competitive level, all player pitch and all players must try out
Majors 10-12 yr olds – Competitive level, all player pitch and all players must try out
Intermediate 13-14 yr olds – Juniors 60 foot pitching mound and 90 foot base paths
Seniors 13-16 yr olds – 60/90 level here, 60 foot pitching mound and 90 foot base paths
Little League age calculator