Rules Reference
| Definitions (runner) | Definition of "runner" |
| 5.05(a) (entire) | The batter becomes a runner when … |
| 5.05(a)(1) | Batter hits a fair ball |
| 5.05(a)(2) | Third strike not caught |
| 5.05(a)(3) | Pitch bounces through strike zone, hits batter |
| 5.05(a)(4) | Batted ball touches umpire or runner |
| 5.05(a)(5) | Home run |
| 5.05(a)(6, 7) | Batted ball bounds out of play or lodges |
| 5.05(a)(8) | Bounding ball deflected out of play |
| 5.05(a)(9) | Fly ball deflected out of play |
| 5.05(b) | Batter awarded first base … |
| 5.05(b)(1) | Base on balls … |
| 5.05(b)(2) | Batter touched by pitched ball |
| 5.05(b)(3) | Batter interfered with |
| 5.05(b)(4) | Batted ball touched by umpire or runner - interference |
| 5.06(a) | Running the bases |
| 5.06(a)(1) | Runner's entitlement to a base, or forced to abandon |
| 5.06(a)(2) | Two runners on the same base |
| 5.06(b) (entire) | Advancing bases / Base awards |
| 5.08(a, b) | How a team scores |
| 5.10(e) | Courtesy runners not allowed |