Directory Listing(s):
| Amateur Baseball Umpire Association | | An umpire information center. Umpire associations, umpire equipment, umpire rules; a resource center for umpires to find and share information. |
| American Federation of Umpires(AFU) | | Group of baseball and softball umpires who share the common goal of consistent improvement in their officiating skills and knowledge of the game. Features clinics, a newsletter, and various resources. |
| San Diego Adult Baseball Umpires | | An informative guide to umpiring baseball with emphasis on rules, mechanics and testing. Examples provided with graphics and helpful suggestions. Umpiring the San Diego Adult Baseball League (SDABL). |
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