Nick Castellanos had the highest on-base percentage when making 70+ plate appearances in May 2021, with an on-base percentage of .476.
| NAME | OBP | PA | MONTH | G | AB | R | H | 2B | 3B | HR | RBI | BB | HBP | SO | SB | CS | TB | XBH | SH | SF | IBB | GIDP | AVG | SLG | OPS | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | N. Castellanos | .476 | 105 | May 2021 | 24 | 93 | 19 | 38 | 9 | 0 | 5 | 15 | 12 | 0 | 20 | 0 | 1 | 62 | 14 | 0 | 0 | 0 | 2 | .409 | .667 | 1.143 |
| 2 |  | Y. Grandal | .467 | 75 | May 2021 | 20 | 44 | 14 | 6 | 0 | 0 | 4 | 9 | 29 | 0 | 26 | 0 | 0 | 18 | 4 | 0 | 2 | 0 | 2 | .136 | .409 | .876 |
| 3 | | Y. Moncada | .455 | 121 | May 2021 | 29 | 96 | 17 | 30 | 9 | 0 | 1 | 14 | 24 | 1 | 35 | 0 | 0 | 42 | 10 | 0 | 0 | 0 | 0 | .313 | .438 | .892 |
| 4 |  | F. Tatis Jr. | .440 | 84 | May 2021 | 20 | 68 | 21 | 24 | 5 | 0 | 9 | 26 | 13 | 0 | 18 | 8 | 1 | 56 | 14 | 0 | 3 | 4 | 2 | .353 | .824 | 1.264 |
| 5 |  | M. Muncy | .440 | 109 | May 2021 | 26 | 91 | 23 | 30 | 5 | 0 | 10 | 19 | 16 | 2 | 25 | 1 | 0 | 65 | 15 | 0 | 0 | 1 | 0 | .330 | .714 | 1.155 |
| 6 | | M. Garver | .438 | 73 | May 2021 | 22 | 57 | 11 | 16 | 5 | 0 | 4 | 8 | 16 | 0 | 18 | 0 | 0 | 33 | 9 | 0 | 0 | 0 | 2 | .281 | .579 | 1.017 |
| 7 |  | M. Semien | .429 | 126 | May 2021 | 28 | 114 | 23 | 42 | 12 | 1 | 8 | 22 | 12 | 0 | 33 | 2 | 0 | 80 | 21 | 0 | 0 | 0 | 3 | .368 | .702 | 1.130 |
| 8 | | C. Taylor | .426 | 101 | May 2021 | 26 | 84 | 21 | 26 | 3 | 1 | 3 | 15 | 14 | 3 | 26 | 4 | 0 | 40 | 7 | 0 | 0 | 0 | 1 | .310 | .476 | .902 |
| 9 |  | J. Abreu | .422 | 102 | May 2021 | 25 | 84 | 16 | 28 | 5 | 1 | 6 | 27 | 9 | 6 | 24 | 0 | 0 | 53 | 12 | 0 | 3 | 0 | 2 | .333 | .631 | 1.053 |
| 10 |  | A. Bregman | .418 | 122 | May 2021 | 26 | 101 | 18 | 30 | 7 | 0 | 2 | 15 | 20 | 1 | 14 | 0 | 0 | 43 | 9 | 0 | 0 | 2 | 2 | .297 | .426 | .844 |
| 11 |  | J. Winker | .409 | 110 | May 2021 | 25 | 97 | 21 | 32 | 5 | 0 | 7 | 13 | 11 | 2 | 18 | 0 | 0 | 58 | 12 | 0 | 0 | 0 | 3 | .330 | .598 | 1.007 |
| 12 |  | B. Crawford | .409 | 93 | May 2021 | 24 | 77 | 19 | 23 | 5 | 0 | 7 | 22 | 14 | 1 | 21 | 1 | 0 | 49 | 12 | 0 | 1 | 2 | 1 | .299 | .636 | 1.045 |
| 13 |  | A. Frazier | .408 | 120 | May 2021 | 28 | 111 | 15 | 40 | 10 | 1 | 2 | 8 | 7 | 2 | 13 | 1 | 3 | 58 | 13 | 0 | 0 | 0 | 1 | .360 | .523 | .931 |
| 14 | | T. Mancini | .405 | 111 | May 2021 | 26 | 97 | 18 | 31 | 8 | 0 | 6 | 25 | 13 | 1 | 21 | 0 | 0 | 57 | 14 | 0 | 0 | 1 | 1 | .320 | .588 | .993 |
| 15 |  | B. Posey | .405 | 79 | May 2021 | 19 | 66 | 11 | 19 | 2 | 0 | 4 | 12 | 13 | 0 | 13 | 0 | 0 | 33 | 6 | 0 | 0 | 3 | 2 | .288 | .500 | .905 |
| 16 |  | A. Judge | .404 | 114 | May 2021 | 28 | 99 | 17 | 32 | 4 | 0 | 6 | 14 | 13 | 1 | 30 | 0 | 0 | 54 | 10 | 0 | 1 | 0 | 2 | .323 | .545 | .949 |
| 17 |  | T. Hernández | .403 | 119 | May 2021 | 28 | 108 | 17 | 37 | 5 | 0 | 6 | 24 | 11 | 0 | 21 | 4 | 1 | 60 | 11 | 0 | 0 | 0 | 2 | .343 | .556 | .959 |
| 18 |  | A. Rizzo | .402 | 82 | May 2021 | 20 | 68 | 8 | 20 | 5 | 1 | 1 | 11 | 10 | 3 | 9 | 0 | 0 | 30 | 7 | 0 | 1 | 2 | 2 | .294 | .441 | .844 |
| 19 |  | K. Bryant | .400 | 110 | May 2021 | 26 | 98 | 17 | 32 | 6 | 1 | 5 | 17 | 10 | 2 | 24 | 2 | 1 | 55 | 12 | 0 | 0 | 1 | 1 | .327 | .561 | .961 |
| 20 |  | C. Santana | .398 | 118 | May 2021 | 28 | 91 | 17 | 23 | 0 | 0 | 4 | 14 | 22 | 2 | 20 | 1 | 0 | 35 | 4 | 0 | 3 | 0 | 2 | .253 | .385 | .783 |
| 21 |  | R. Hoskins | .398 | 113 | May 2021 | 28 | 96 | 11 | 29 | 5 | 0 | 3 | 17 | 13 | 3 | 24 | 1 | 0 | 43 | 8 | 0 | 1 | 0 | 1 | .302 | .448 | .846 |
| 22 |  | C. Blackmon | .396 | 96 | May 2021 | 27 | 84 | 14 | 26 | 4 | 1 | 2 | 14 | 9 | 3 | 10 | 0 | 0 | 38 | 7 | 0 | 0 | 0 | 0 | .310 | .452 | .848 |
| 23 | | J. Candelario | .394 | 109 | May 2021 | 25 | 96 | 16 | 30 | 8 | 0 | 3 | 11 | 12 | 1 | 29 | 0 | 0 | 47 | 11 | 0 | 0 | 0 | 1 | .313 | .490 | .884 |
| 24 |  | X. Bogaerts | .394 | 104 | May 2021 | 25 | 90 | 19 | 28 | 5 | 0 | 6 | 18 | 11 | 2 | 18 | 3 | 0 | 51 | 11 | 0 | 1 | 0 | 1 | .311 | .567 | .961 |
| 25 |  | A. Riley | .394 | 104 | May 2021 | 25 | 90 | 14 | 28 | 6 | 0 | 7 | 15 | 11 | 2 | 33 | 0 | 0 | 55 | 13 | 0 | 1 | 1 | 3 | .311 | .611 | 1.005 |
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.
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Phillies - y | 96 | 66 | .593 | |
83 | 79 | .512 | 13.0 | |
79 | 83 | .488 | 17.0 | |
76 | 86 | .469 | 20.0 | |
66 | 96 | .407 | 30.0 | |
| NL Central | W | L | PCT | GB |
 Brewers - y | 97 | 65 | .599 | |
 Cubs - w | 92 | 70 | .568 | 5.0 |
 Reds - w | 83 | 79 | .512 | 14.0 |
78 | 84 | .481 | 19.0 | |
71 | 91 | .438 | 26.0 | |
| NL West | W | L | PCT | GB |
 Dodgers - y | 93 | 69 | .574 | |
 Padres - w | 90 | 72 | .556 | 3.0 |
81 | 81 | .500 | 12.0 | |
80 | 82 | .494 | 13.0 | |
43 | 119 | .265 | 50.0 |
Mets
Marlins
Braves
Nationals
Giants
Diamondbacks
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Blue Jays - y | 94 | 68 | .580 | |
 Yankees - w | 94 | 68 | .580 | |
 Red Sox - w | 89 | 73 | .549 | 5.0 |
77 | 85 | .475 | 17.0 | |
75 | 87 | .463 | 19.0 | |
| AL Central | W | L | PCT | GB |
 Guardians - y | 88 | 74 | .543 | |
 Tigers - w | 87 | 75 | .537 | 1.0 |
82 | 80 | .506 | 6.0 | |
70 | 92 | .432 | 18.0 | |
60 | 102 | .370 | 28.0 | |
| AL West | W | L | PCT | GB |
 Mariners - y | 90 | 72 | .556 | |
87 | 75 | .537 | 3.0 | |
81 | 81 | .500 | 9.0 | |
76 | 86 | .469 | 14.0 | |
72 | 90 | .444 | 18.0 |
Rays
Orioles
Royals
Twins
White Sox
Astros
Rangers
Athletics
Angels
