49 players are tied for the highest on-base percentage in a month, with an on-base percentage of 1.000. The first three are Jack Winkler in July 2025, José Fermín in June 2025 and in October 2023 and Ryne Nelson in March 2025.
Interpreted as:
highest obp in a month out by a player of qualifying playrs| NAME | OBP | OUT | MONTH | G | AB | H | 2B | 3B | HR | RBI | BB | HBP | SO | PA | TB | XBH | SH | SF | IBB | AVG | SLG | OPS | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | J. Winkler | 1.000 | 2 | July 2025 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 2 | | J. Fermín | 1.000 | 1 | June 2025 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 3 | | R. Nelson | 1.000 | 1 | March 2025 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 4 | | J. Tena | 1.000 | 1 | March 2025 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 5 | | M. Mastrobuoni | 1.000 | 2 | March 2025 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 6 | | J. Hurtubise | 1.000 | 2 | March 2025 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | |||
| 7 | | D. Ellis | 1.000 | 2 | September 2024 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 8 | | J. Wiemer | 1.000 | 2 | August 2024 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | |||
| 9 | | A. Williams | 1.000 | 1 | July 2024 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | |||
| 10 |  | J. Wilson | 1.000 | 0 | July 2024 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 11 | | B. Gamel | 1.000 | 2 | June 2024 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | |||
| 12 |  | L. Sosa | 1.000 | 2 | May 2024 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 13 | | R. McKenna | 1.000 | 1 | April 2024 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 14 | | T. Jankowski | 1.000 | 0 | March 2024 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 4 | 1 | 0 | 0 | 0 | 1.000 | 4.000 | 5.000 |
| 15 | | R. Lewis | 1.000 | 4 | March 2024 | 1 | 2 | 2 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 | 5 | 1 | 0 | 0 | 0 | 1.000 | 2.500 | 3.500 |
| 16 | | V. Caratini | 1.000 | 1 | October 2023 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 1.000 | 2.000 | 3.000 |
| 17 | | E. Díaz | 1.000 | 2 | October 2023 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 18 |  | M. Olson | 1.000 | 1 | October 2023 | 1 | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 19 |  | D. Peralta | 1.000 | 0 | October 2023 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 20 | | D. Smith | 1.000 | 1 | October 2023 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | |||
| 21 | | R. Tellez | 1.000 | 1 | October 2023 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | |||
| 22 |  | J. Soto | 1.000 | 2 | October 2023 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | |||
| 23 |  | B. Rooker | 1.000 | 4 | October 2023 | 1 | 3 | 3 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 4 | 7 | 2 | 0 | 0 | 0 | 1.000 | 2.333 | 3.333 |
| 24 | | S. Bouchard | 1.000 | 2 | October 2023 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 4 | 1 | 0 | 0 | 0 | 1.000 | 4.000 | 5.000 |
| 25 | | W. Brennan | 1.000 | 1 | October 2023 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
StatMuse has event-level data for on-base percentage and outs going back to the 1974 season.
Some of the information used here was obtained free of charge from Retrosheet.
Phillies
Mets
Marlins
Braves
Nationals
COL
CWS
Brewers
Cubs
Dodgers
Padres
Blue Jays
Yankees
Guardians
Tigers
Mariners
Astros
CIN
STL
ATH
BOS
TBR
KCR
SFG
LAA
AZ
