Since 2000, 49 players are tied for the best on-base percentage in a month, with an on-base percentage of 1.000. The first three are Rob Refsnyder this month, Victor Mederos last month and Tyrone Taylor in June 2026.
Interpreted as:
MLB highest obp by a player in a month since 2000| NAME | OBP | MONTH | G | AB | R | H | 2B | 3B | HR | RBI | BB | HBP | SO | SB | CS | PA | TB | XBH | SH | SF | IBB | GIDP | AVG | SLG | OPS | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | R. Refsnyder | 1.000 | August 2026 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | |||
| 2 | | V. Mederos | 1.000 | July 2026 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 3 | | T. Taylor | 1.000 | June 2026 | 2 | 2 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 4 | | J. Cox | 1.000 | May 2026 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 1.000 | 2.000 | 3.000 |
| 5 | | E. Hernández | 1.000 | May 2026 | 2 | 4 | 2 | 4 | 2 | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 4 | 9 | 3 | 0 | 0 | 0 | 0 | 1.000 | 2.250 | 3.250 |
| 6 | | L. Williams | 1.000 | April 2026 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 7 | | D. Moore | 1.000 | March 2026 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 8 | | J. Winkler | 1.000 | July 2025 | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 9 | | J. FermÃn | 1.000 | June 2025 | 3 | 3 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 10 | | J. Tena | 1.000 | March 2025 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 11 | | M. Mastrobuoni | 1.000 | March 2025 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 12 | | R. Nelson | 1.000 | March 2025 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 13 | | J. Hurtubise | 1.000 | March 2025 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 14 | | D. Ellis | 1.000 | September 2024 | 3 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 15 | | J. Wiemer | 1.000 | August 2024 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 16 | | A. Williams | 1.000 | July 2024 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 17 |  | J. Wilson | 1.000 | July 2024 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 18 | | B. Gamel | 1.000 | June 2024 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 19 |  | L. Sosa | 1.000 | May 2024 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 20 | | R. McKenna | 1.000 | April 2024 | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 21 | | T. Jankowski | 1.000 | March 2024 | 2 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | 1 | 0 | 0 | 0 | 0 | 1.000 | 4.000 | 5.000 |
| 22 | | R. Lewis | 1.000 | March 2024 | 1 | 2 | 1 | 2 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 5 | 1 | 0 | 0 | 0 | 0 | 1.000 | 2.500 | 3.500 |
| 23 | | V. Caratini | 1.000 | October 2023 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 1.000 | 2.000 | 3.000 |
| 24 | | E. DÃaz | 1.000 | October 2023 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 25 |  | M. Olson | 1.000 | October 2023 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
StatMuse has game-level data for on-base percentage going back to the 1908 season.
Some of the information used here was obtained free of charge from Retrosheet.
More MLB News
Family celebrates its connection to the Chicago Cubs and its viewpoint for the team's history
Shaking off Marte drama, the Diamondbacks earn 40th comeback win to stay in playoff race
RamÃrez has 5 RBIs and Kwan gets 5 hits to rally streaking Guardians past Angels 8-6 in 10 innings
Ryan Waldschmidt hits game-winning 2-run HR with 2 outs in 9th to send D-backs past Cubs 5-4
Gage Jump strikes out 9 and Carlos Cortes homers to lift the A's over the Twins 4-2
Oneil Cruz homers off Mason Miller in 9th, sending Pirates to a 1-0 win over Padres
More Mariners Stats
Team Batting Leaders 
HR
20
RodrÃguez
RBI
58
Arozarena
AVG
.272
Arozarena
Team Pitching Leaders 
W
11
Gilbert
K
162
Gilbert
ERA
3.36
Gilbert
Team Rankings
HR
155
14th
R
526
29th
SO
1,133
11th
ERA
4.08
13th
Astros
Rangers
Mariners
Athletics
Angels
PHI
TOR
BOS
MLB 2026 Batting Leaders
MLB 2026 Pitching Leaders
MLB Fantasy 2026
MLB 2026 Betting
MLB 2026 Standings
| NL East | W | L | PCT | GB |
|---|---|---|---|---|
77 | 55 | .583 | ||
73 | 60 | .549 | 4.5 | |
67 | 66 | .504 | 10.5 | |
62 | 72 | .463 | 16.0 | |
60 | 72 | .455 | 17.0 | |
| NL Central | W | L | PCT | GB |
81 | 51 | .614 | ||
76 | 57 | .571 | 5.5 | |
66 | 67 | .496 | 15.5 | |
65 | 69 | .485 | 17.0 | |
62 | 71 | .466 | 19.5 | |
| NL West | W | L | PCT | GB |
80 | 52 | .606 | ||
71 | 62 | .534 | 9.5 | |
70 | 63 | .526 | 10.5 | |
54 | 78 | .409 | 26.0 | |
51 | 81 | .386 | 29.0 |
Braves
Marlins
Nationals
Mets
Brewers
Cubs
Cardinals
Pirates
Reds
Dodgers
Padres
Diamondbacks
Giants
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
78 | 54 | .591 | ||
74 | 57 | .565 | 3.5 | |
73 | 59 | .553 | 5.0 | |
64 | 68 | .485 | 14.0 | |
64 | 69 | .481 | 14.5 | |
| AL Central | W | L | PCT | GB |
69 | 63 | .523 | ||
67 | 66 | .504 | 2.5 | |
64 | 69 | .481 | 5.5 | |
62 | 70 | .470 | 7.0 | |
59 | 74 | .444 | 10.5 | |
| AL West | W | L | PCT | GB |
66 | 66 | .500 | ||
66 | 67 | .496 | 0.5 | |
64 | 69 | .481 | 2.5 | |
52 | 81 | .391 | 14.5 | |
52 | 81 | .391 | 14.5 |
Rays
Yankees
Orioles
White Sox
Guardians
Twins
Tigers
Royals