| Abbreviation | Definition |
|---|---|
| RBA | Rangers Baseball Arlington |
| RBA | Real Batting Average |
| RBB | Red and Black Bloc (Australian football) |
| RBC | Roosendaalse Boys Combinatie |
| RBC | Royal Bank Cup |
| RBD | Rebound |
| RBG | Really Boring Game |
| RBI | Runs Batted In |
| RBO | Rated Beginners Open |
| RBP | Range Bonus Plays |
| RBY | Redlands Baseball for Youth |
| RC | Racing Club |
| RC | Reality Check |
| RC | Rookie Collection |
| RC | Royal Challengers |
| RC | Rugby Club |
| RC | Running Club |
| RC | Runs Created |
| RCB | River City Beemers |
| RCC | Rockville Country Club |