League Index
MLB leagues overview.
This section compares the American League and National League using the same bettor-first lens as the team and division pages: scoring environment, run prevention, totals context, and links into each league page.
League comparison
| League | Teams | Combined Record | Runs Scored | Runs Allowed | Run Diff | Avg OPS | Avg ERA | Avg Total |
|---|---|---|---|---|---|---|---|---|
| American League | 15 | 1190-1238 | 10561 | 10837 | -276 | .712 | 4.14 | 8.8 |
| National League | 15 | 1239-1191 | 11208 | 10932 | +276 | .725 | 4.21 | 8.5 |