Since 1913, the New York Yankees have their worst on-base percentage with 8+ games played in Octobers, with an on-base percentage of .322.
| TEAM | OBP | G | MONTH | W% | W | L | AB | R | H | 2B | 3B | HR | RBI | BB | HBP | SO | SB | CS | PA | TB | XBH | SH | SF | IBB | GIDP | AVG | SLG | OPS | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | Yankees | .322 | 168 | October | .539 | 90 | 77 | 5,633 | 694 | 1,401 | 238 | 43 | 137 | 637 | 579 | 40 | 953 | 133 | 31 | 6,332 | 2,136 | 418 | 52 | 28 | 29 | 99 | .249 | .379 | .701 |
| 2 | | Yankees | .336 | 2,982 | September | .586 | 1,741 | 1,231 | 100,997 | 14,210 | 26,468 | 4,421 | 778 | 2,757 | 10,801 | 703 | 15,738 | 1,593 | 416 | 114,290 | 40,716 | 7,956 | 1,294 | 495 | 481 | 1,731 | .262 | .403 | .739 | |
| 3 | | Yankees | .340 | 3,273 | August | .561 | 1,832 | 1,433 | 112,376 | 15,988 | 30,093 | 5,014 | 887 | 3,199 | 11,844 | 790 | 16,608 | 1,654 | 517 | 127,108 | 46,478 | 9,100 | 1,522 | 576 | 531 | 1,990 | .268 | .414 | .754 | |
| 4 | | Yankees | .341 | 1,899 | April | .566 | 1,073 | 823 | 64,349 | 9,190 | 16,802 | 2,965 | 434 | 1,814 | 8,591 | 7,486 | 510 | 10,197 | 1,151 | 398 | 73,524 | 26,077 | 5,213 | 748 | 431 | 335 | 1,310 | .261 | .405 | .746 |
| 5 | | Yankees | .341 | 2,997 | May | .583 | 1,737 | 1,243 | 102,245 | 14,829 | 27,099 | 4,628 | 858 | 2,900 | 11,293 | 779 | 15,018 | 1,716 | 505 | 116,258 | 42,143 | 8,386 | 1,344 | 597 | 496 | 1,850 | .265 | .412 | .753 | |
| 6 | | Yankees | .343 | 3,047 | June | .575 | 1,746 | 1,293 | 104,813 | 15,433 | 28,181 | 4,680 | 861 | 3,157 | 11,351 | 702 | 15,247 | 1,625 | 493 | 118,875 | 44,054 | 8,698 | 1,441 | 568 | 514 | 1,812 | .269 | .420 | .763 | |
| 7 | | Yankees | .345 | 3,150 | July | .585 | 1,834 | 1,302 | 108,336 | 16,135 | 29,506 | 4,980 | 910 | 3,115 | 11,442 | 809 | 15,295 | 1,629 | 490 | 122,787 | 45,651 | 9,005 | 1,621 | 579 | 455 | 1,892 | .272 | .421 | .766 | |
| 8 | | Yankees | .370 | 18 | March | .778 | 14 | 4 | 603 | 119 | 161 | 28 | 2 | 40 | 114 | 93 | 10 | 149 | 5 | 1 | 715 | 313 | 70 | 2 | 7 | 1 | 19 | .267 | .519 | .889 |
Some of the information used here was obtained free of charge from Retrosheet.
Yankees 
Red Sox 
Blue Jays 
Rays 
Orioles 
SEA 
NYM 
Phillies 
Cubs 
Cardinals 
Dodgers 
Padres 
Tigers 
Guardians 
Astros 
LAA 
MIN 
KCR 
MIL 
PIT 
WSH 
ATL 
