- Amateur Athletic Union (AAU)
- American Amateur Baseball Congress (AABC)
- American Baseball Coaches Association (ABCA)
- American Legion Baseball
- Babe Ruth Baseball
- Dixie Baseball
- Little League Baseball
- National Amateur Baseball Federation
- National Association of Intercollegiate Athletics (NAIA)
- National Assoc. of Police Athletic Leagues
- National Baseball Congress (NBC)
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- National Club Baseball Association (NCBA)
- National Collegiate Athletic Association (NCAA)
- National Federation of State High School Associations (NFHS)
- National High School Baseball Coaches Assoc.
- National Junior College Athletic Association (NJCAA)
- PONY Baseball
- T-BALL USA
- United States Specialty Sports Association (USSSA)
- World Baseball Classic (WBC)
- YMCAs of the USA
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