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High School Indoor League
The off-season is a critical time to improve your game. This League is for 9th through12th graders looking to improve their skills. Through live at-bats, with professional coaches and umpires. Play competitive baseball in a fun, unique, and warm environment.
High School Fall League
Grand Slam USA is organizing its 25th annual Fall Baseball League along with our high school fall skills clinics. This league is for 9th through 12th graders who want to get extremely vital repetitions in the fall and experience game situations.
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