Since 1920, Tom Morgan has allowed the fewest walks by a relief pitcher with 50.0+ innings pitched in a season, with 2 allowed in 1958.
| NAME | BB | IP | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | H | ER | R | HR | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | T. Morgan | 2 | 60.2 | 1958 | 38 | 2 | 5 | .286 | 0 | 2.82 | 33 | 0 | 0 | 1 | 64 | 19 | 25 | 6 | 1 | 11 | 0 | 244 | 0 | 4.90 | 0.30 | 16.50 | 0.89 | 13.5 | 0.8 | 1.09 | .287 | 3.71 | 9.49 | |
| 2 | | D. Eckersley | 3 | 57.2 | 1989 | 51 | 4 | 0 | 1.000 | 0 | 1.56 | 55 | 0 | 0 | 33 | 32 | 10 | 10 | 5 | 1 | 46 | 0 | 206 | 0 | 8.58 | 0.47 | 18.33 | 0.78 | 26.7 | 1.5 | 0.61 | .190 | 1.56 | 4.99 | |
| 3 | | R. Erlin | 4 | 52.2 | 2018 | 27 | 1 | 1 | .500 | 0 | 2.05 | 44 | 0 | 0 | 0 | 38 | 12 | 13 | 4 | 0 | 8 | 0 | 190 | 1 | 7.52 | 0.68 | 11.00 | 0.68 | 23.2 | 2.1 | 0.80 | .246 | 2.22 | 6.49 | |
| 4 | | E. Scribner | 4 | 60.0 | 2015 | 54 | 2 | 2 | .500 | 0 | 4.35 | 64 | 0 | 0 | 0 | 58 | 29 | 31 | 14 | 2 | 14 | 0 | 238 | 2 | 9.60 | 0.60 | 16.00 | 2.10 | 26.9 | 1.7 | 1.03 | .286 | 4.65 | 8.70 | |
| 5 | | D. Eckersley | 4 | 73.1 | 1990 | 63 | 4 | 2 | .667 | 0 | 0.61 | 73 | 0 | 0 | 48 | 41 | 5 | 9 | 2 | 0 | 61 | 1 | 262 | 0 | 8.96 | 0.49 | 18.25 | 0.25 | 27.9 | 1.5 | 0.61 | .213 | 1.10 | 5.03 | |
| 6 | | C. Martin | 5 | 56.0 | 2022 | TOT | 60 | 4 | 1 | .800 | 0 | 3.05 | 74 | 0 | 0 | 2 | 50 | 19 | 20 | 6 | 1 | 6 | 1 | 225 | 7 | 11.89 | 0.80 | 14.80 | 0.96 | 32.9 | 2.2 | 0.98 | .317 | 3.21 | 8.04 |
| 7 | | C. Martin | 5 | 55.2 | 2019 | TOT | 58 | 1 | 3 | .250 | 0 | 3.40 | 65 | 0 | 0 | 4 | 52 | 21 | 23 | 9 | 0 | 20 | 0 | 216 | 0 | 10.51 | 0.81 | 13.00 | 1.46 | 30.1 | 2.3 | 1.02 | .314 | 3.72 | 8.41 |
| 8 | | D. Otero | 5 | 58.2 | 2018 | 61 | 2 | 1 | .667 | 0 | 5.22 | 43 | 0 | 0 | 1 | 69 | 34 | 36 | 12 | 3 | 19 | 3 | 247 | 0 | 6.60 | 0.77 | 8.60 | 1.84 | 17.4 | 2.0 | 1.26 | .310 | 5.52 | 10.59 | |
| 9 | | C. Qualls | 5 | 51.1 | 2014 | 58 | 1 | 5 | .167 | 0 | 3.33 | 43 | 0 | 0 | 19 | 54 | 19 | 22 | 5 | 2 | 41 | 2 | 213 | 1 | 7.54 | 0.88 | 8.60 | 0.88 | 20.2 | 2.3 | 1.15 | .310 | 3.86 | 9.47 | |
| 10 | | E. Mujica | 5 | 64.2 | 2013 | 65 | 2 | 1 | .667 | 0 | 2.78 | 46 | 0 | 0 | 37 | 60 | 20 | 20 | 9 | 1 | 49 | 1 | 255 | 0 | 6.40 | 0.70 | 9.20 | 1.25 | 18.0 | 2.0 | 1.01 | .263 | 2.78 | 8.35 | |
| 11 | | W. Lopez | 5 | 67.0 | 2010 | 68 | 5 | 2 | .714 | 0 | 2.96 | 50 | 0 | 0 | 1 | 66 | 22 | 23 | 4 | 0 | 14 | 1 | 262 | 2 | 6.72 | 0.67 | 10.00 | 0.54 | 19.1 | 1.9 | 1.06 | .305 | 3.09 | 8.87 | |
| 12 | | M. Capps | 5 | 53.2 | 2008 | 49 | 2 | 3 | .400 | 0 | 3.02 | 39 | 0 | 0 | 21 | 47 | 18 | 20 | 5 | 2 | 39 | 0 | 211 | 0 | 6.54 | 0.84 | 7.80 | 0.84 | 18.5 | 2.4 | 0.97 | .263 | 3.35 | 7.88 | |
| 13 | | L. Mangum | 5 | 50.1 | 1933 | 20 | 2 | 1 | .667 | 0 | 3.04 | 19 | 0 | 0 | 0 | 52 | 17 | 19 | 0 | 0 | 10 | 205 | 0 | 3.40 | 0.89 | 3.80 | 0.00 | 9.3 | 2.4 | 1.13 | .287 | 3.40 | 9.30 | ||
| 14 |  | N. Martinez | 6 | 53.1 | 2024 | 26 | 5 | 2 | .714 | 0 | 1.86 | 46 | 0 | 0 | 0 | 40 | 11 | 12 | 4 | 0 | 3 | 0 | 204 | 2 | 7.76 | 1.01 | 7.67 | 0.68 | 22.5 | 2.9 | 0.86 | .243 | 2.03 | 6.75 | |
| 15 | | T. Rogers | 6 | 70.1 | 2024 | 77 | 3 | 4 | .429 | 0 | 2.82 | 51 | 0 | 0 | 1 | 67 | 22 | 23 | 7 | 7 | 13 | 2 | 290 | 1 | 6.53 | 0.77 | 8.50 | 0.90 | 17.6 | 2.1 | 1.04 | .274 | 2.94 | 8.57 | |
| 16 | | J. Mantiply | 6 | 60.0 | 2022 | 69 | 2 | 5 | .286 | 0 | 2.85 | 61 | 0 | 0 | 2 | 59 | 19 | 22 | 6 | 3 | 9 | 0 | 243 | 3 | 9.15 | 0.90 | 10.17 | 0.90 | 25.1 | 2.5 | 1.08 | .317 | 3.30 | 8.85 | |
| 17 | | R. Bleier | 6 | 58.0 | 2021 | 68 | 3 | 2 | .600 | 0 | 2.95 | 44 | 0 | 0 | 0 | 51 | 19 | 20 | 4 | 3 | 6 | 3 | 225 | 1 | 6.83 | 0.93 | 7.33 | 0.62 | 19.6 | 2.7 | 0.98 | .280 | 3.10 | 7.91 | |
| 18 | | P. Neshek | 6 | 62.1 | 2017 | TOT | 71 | 5 | 3 | .625 | 0 | 1.59 | 69 | 0 | 0 | 1 | 48 | 11 | 13 | 3 | 0 | 7 | 0 | 235 | 0 | 9.96 | 0.87 | 11.50 | 0.43 | 29.4 | 2.6 | 0.87 | .287 | 1.88 | 6.93 |
| 19 | | E. Mujica | 6 | 69.2 | 2010 | 59 | 2 | 1 | .667 | 0 | 3.62 | 72 | 0 | 0 | 0 | 59 | 28 | 29 | 14 | 0 | 24 | 0 | 268 | 1 | 9.30 | 0.78 | 12.00 | 1.81 | 26.9 | 2.2 | 0.93 | .256 | 3.75 | 7.62 | |
| 20 |  | M. Rivera | 6 | 70.2 | 2008 | 64 | 6 | 5 | .545 | 0 | 1.40 | 77 | 0 | 0 | 39 | 41 | 11 | 11 | 4 | 2 | 60 | 0 | 259 | 1 | 9.81 | 0.76 | 12.83 | 0.51 | 29.7 | 2.3 | 0.67 | .218 | 1.40 | 5.22 | |
| 21 | | C. Meredith | 6 | 50.2 | 2006 | 45 | 5 | 1 | .833 | 0 | 1.07 | 37 | 0 | 0 | 0 | 30 | 6 | 6 | 3 | 2 | 11 | 3 | 185 | 0 | 6.57 | 1.07 | 6.17 | 0.53 | 20.0 | 3.2 | 0.71 | .197 | 1.07 | 5.33 | |
| 22 | | D. Eckersley | 6 | 60.0 | 1996 | 63 | 0 | 6 | .000 | 0 | 3.30 | 49 | 0 | 0 | 30 | 65 | 22 | 26 | 8 | 4 | 53 | 2 | 251 | 0 | 7.35 | 0.90 | 8.17 | 1.20 | 19.5 | 2.4 | 1.18 | .310 | 3.90 | 9.75 | |
| 23 | | D. Jones | 6 | 54.0 | 1994 | 47 | 2 | 4 | .333 | 0 | 2.17 | 38 | 0 | 0 | 27 | 55 | 13 | 14 | 2 | 0 | 42 | 0 | 226 | 1 | 6.33 | 1.00 | 6.33 | 0.33 | 16.8 | 2.7 | 1.13 | .294 | 2.33 | 9.17 | |
| 24 | | D. Hall | 6 | 61.1 | 1970 | 32 | 10 | 5 | .667 | 0 | 3.08 | 30 | 0 | 0 | 3 | 51 | 21 | 25 | 8 | 0 | 17 | 2 | 232 | 0 | 4.40 | 0.88 | 5.00 | 1.17 | 12.9 | 2.6 | 0.93 | .229 | 3.67 | 7.48 | |
| 25 | | D. Newcombe | 6 | 53.0 | 1960 | TOT | 19 | 2 | 1 | .667 | 0 | 2.55 | 28 | 0 | 0 | 1 | 53 | 15 | 16 | 3 | 0 | 13 | 0 | 208 | 0 | 4.75 | 1.02 | 4.67 | 0.51 | 13.5 | 2.9 | 1.11 | .292 | 2.72 | 9.00 |
DET
OAK
SDP
CLE
STL
HOU
PIT
BSN
CIN
SFG
ARI
MIA
SDP
BALStatMuse has game-level data for innings pitched and walks allowed going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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Team Pitching Leaders 
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MLB 2026 Batting Leaders
MLB 2026 Pitching Leaders
MLB Fantasy 2026
MLB 2026 Betting
MLB 2026 Standings
| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Braves - y | 94 | 68 | .580 | |
 Phillies - w | 88 | 74 | .543 | 6.0 |
80 | 82 | .494 | 14.0 | |
77 | 85 | .475 | 17.0 | |
74 | 88 | .457 | 20.0 | |
| NL Central | W | L | PCT | GB |
 Brewers - y | 103 | 59 | .636 | |
 Cubs - w | 89 | 73 | .549 | 14.0 |
82 | 80 | .506 | 21.0 | |
77 | 85 | .475 | 26.0 | |
75 | 87 | .463 | 28.0 | |
| NL West | W | L | PCT | GB |
 Dodgers - y | 100 | 62 | .617 | |
 Padres - w | 91 | 71 | .562 | 9.0 |
86 | 76 | .531 | 14.0 | |
65 | 97 | .401 | 35.0 | |
58 | 104 | .358 | 42.0 |
Nationals
Mets
Diamondbacks
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Rays - y | 98 | 64 | .605 | |
 Yankees - w | 93 | 68 | .578 | 4.5 |
 Red Sox - w | 87 | 75 | .537 | 11.0 |
79 | 82 | .491 | 18.5 | |
79 | 83 | .488 | 19.0 | |
| AL Central | W | L | PCT | GB |
 Guardians - y | 85 | 77 | .525 | |
 White Sox - w | 84 | 78 | .519 | 1.0 |
77 | 85 | .475 | 8.0 | |
76 | 86 | .469 | 9.0 | |
69 | 93 | .426 | 16.0 | |
| AL West | W | L | PCT | GB |
 Astros - y | 81 | 81 | .500 | |
80 | 82 | .494 | 1.0 | |
76 | 86 | .469 | 5.0 | |
64 | 98 | .395 | 17.0 | |
62 | 100 | .383 | 19.0 |
Blue Jays
Rangers
Mariners
Angels