The following are the baseball events of the year 1891 throughout the world.
World Series: Boston (NL) declined to meet Boston (AA)
| American Association | National League | |||
|---|---|---|---|---|
| Stat | Player | Total | Player | Total |
| AVG | Dan Brouthers (BSR) | .350 | Billy Hamilton (PHI) | .340 |
| HR | Duke Farrell (BSR) | 12 | Harry Stovey (BSN) Mike Tiernan (NYG) | 16 |
| RBI | Hugh Duffy (BSR) Duke Farrell (BSR) | 110 | Cap Anson (CHI) | 120 |
| W | Sadie McMahon (BAL) | 35 | Bill Hutchinson (CHI) | 44 |
| ERA | Ed Crane (CKE) | 2.45 | John Ewing (NYG) | 2.27 |
| K | Jack Stivetts (STL) | 259 | Amos Rusie (NYG) | 337 |
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