23 players were tied for the highest on-base percentage when batting 1st in 2025, with an on-base percentage of 1.000. The first three are Reese McGuire, Moisés Ballesteros and Adolis García.
| NAME | OBP | SEASON | TM | BAT ORDER | 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. McGuire | 1.000 | 2025 |  CHC | 1 | 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 |
| 2 | | M. Ballesteros | 1.000 | 2025 | CHC | 1 | 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 |
| 3 |  | A. García | 1.000 | 2025 |  TEX | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | |||
| 4 | | E. Rivera | 1.000 | 2025 |  BAL | 1 | 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 |
| 5 | | C. Devanney | 1.000 | 2025 |  PIT | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 0 | 0 | 1.000 | 2.000 | 3.000 |
| 6 | | C. Narváez | 1.000 | 2025 |  BOS | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 7 | | L. Davidson | 1.000 | 2025 |  LAA | 1 | 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 |
| 8 | | J. Winkler | 1.000 | 2025 |  MIA | 1 | 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 |
| 9 | | L. Urías | 1.000 | 2025 |  ATH | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 10 |  | S. Suzuki | 1.000 | 2025 | CHC | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 11 | | C. Kelly | 1.000 | 2025 | CHC | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 12 | | K. Newman | 1.000 | 2025 | LAA | 1 | 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 |
| 13 | | C. Hummel | 1.000 | 2025 |  HOU | 1 | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 14 | | E. Haase | 1.000 | 2025 |  MIL | 1 | 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 |
| 15 | | D. Avans | 1.000 | 2025 | ATH | 1 | 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 |
| 16 | | W. Benson | 1.000 | 2025 |  CIN | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1.000 | 1.000 | 2.000 |
| 17 | | A. Barnes | 1.000 | 2025 |  LAD | 1 | 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 | | H. Kjerstad | 1.000 | 2025 | BAL | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||
| 19 | | D. Schneemann | 1.000 | 2025 |  CLE | 1 | 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 | | G. Pauley | 1.000 | 2025 | MIA | 1 | 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 | | M. Siani | 1.000 | 2025 |  STL | 1 | 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 |
| 22 | | C. Biggio | 1.000 | 2025 |  KCR | 1 | 2 | 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 |
| 23 | | MJ Melendez | 1.000 | 2025 | KCR | 1 | 2 | 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 |  | A. Barger | .833 | 2025 |  TOR | 1 | 4 | 6 | 1 | 5 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 6 | 6 | 1 | 0 | 0 | 0 | 0 | .833 | 1.000 | 1.833 |
| 25 | | L. Keaschall | .800 | 2025 |  MIN | 1 | 1 | 5 | 2 | 4 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 5 | 4 | 0 | 0 | 0 | 0 | 0 | .800 | .800 | 1.600 |
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.
WSH
Phillies
Mets
Padres
Yankees
Tigers
Mariners
ATL
TBR
SFG
AZ
