I don't have anything for this season, but Aroldis Chapman had the lowest ERA by a relief pitcher with 30.0+ innings pitched in 2025, with an ERA of 1.17.
Interpreted as:
relief pitchers with lowest era with at least 30 ip this regular season| NAME | ERA | IP | SEASON | TM | G | W | L | W% | GS | SO | CG | SHO | SV | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | A. Chapman | 1.17 | 61.1 | 2025 | 67 | 5 | 3 | .625 | 0 | 85 | 0 | 0 | 32 | 28 | 8 | 9 | 3 | 15 | 0 | 43 | 0 | 228 | 6 | 12.47 | 2.20 | 5.67 | 0.44 | 37.3 | 6.6 | 0.70 | .200 | 1.32 | 4.11 | |
| 2 |  | E. Miller | 1.50 | 30.0 | 2025 | 36 | 4 | 1 | .800 | 0 | 22 | 0 | 0 | 0 | 24 | 5 | 5 | 0 | 20 | 3 | 2 | 4 | 128 | 1 | 6.60 | 6.00 | 1.10 | 0.00 | 17.2 | 15.6 | 1.47 | .289 | 1.50 | 7.20 | |
| 3 | | C. Winn | 1.51 | 41.2 | 2025 | 33 | 0 | 1 | .000 | 0 | 35 | 0 | 0 | 0 | 23 | 7 | 8 | 3 | 17 | 4 | 10 | 2 | 162 | 1 | 7.56 | 3.67 | 2.06 | 0.65 | 21.6 | 10.5 | 0.96 | .194 | 1.73 | 4.97 | |
| 4 |  | E. DÃaz | 1.63 | 66.1 | 2025 | 62 | 6 | 3 | .667 | 0 | 98 | 0 | 0 | 28 | 37 | 12 | 14 | 4 | 21 | 8 | 48 | 0 | 258 | 7 | 13.30 | 2.85 | 4.67 | 0.54 | 38.0 | 8.1 | 0.87 | .260 | 1.90 | 5.02 | |
| 5 | | A. Uribe | 1.67 | 75.1 | 2025 | 75 | 3 | 2 | .600 | 0 | 90 | 0 | 0 | 7 | 51 | 14 | 18 | 4 | 27 | 6 | 15 | 2 | 298 | 5 | 10.75 | 3.23 | 3.33 | 0.48 | 30.2 | 9.1 | 1.04 | .275 | 2.15 | 6.09 | |
| 6 |  | A. Muñoz | 1.73 | 62.1 | 2025 | 64 | 3 | 3 | .500 | 0 | 83 | 0 | 0 | 38 | 36 | 12 | 18 | 2 | 28 | 4 | 47 | 3 | 254 | 7 | 11.98 | 4.04 | 2.96 | 0.29 | 32.7 | 11.0 | 1.03 | .248 | 2.60 | 5.20 | |
| 7 | | E. Lauer | 1.76 | 30.2 | 2025 | 13 | 3 | 0 | 1.000 | 0 | 28 | 0 | 0 | 0 | 15 | 6 | 6 | 1 | 8 | 1 | 2 | 0 | 113 | 0 | 8.22 | 2.35 | 3.50 | 0.29 | 24.8 | 7.1 | 0.75 | .187 | 1.76 | 4.40 | |
| 8 | | R. RodrÃguez | 1.78 | 50.2 | 2025 | 50 | 3 | 5 | .375 | 0 | 67 | 0 | 0 | 4 | 34 | 10 | 12 | 4 | 11 | 4 | 15 | 0 | 198 | 2 | 11.90 | 1.95 | 6.09 | 0.71 | 33.8 | 5.6 | 0.89 | .268 | 2.13 | 6.04 | |
| 9 | | B. Fisher | 1.85 | 48.2 | 2025 | 51 | 7 | 0 | 1.000 | 0 | 61 | 0 | 0 | 0 | 28 | 10 | 10 | 2 | 18 | 3 | 12 | 1 | 193 | 0 | 11.28 | 3.33 | 3.39 | 0.37 | 31.6 | 9.3 | 0.95 | .239 | 1.85 | 5.18 | |
| 10 | | J. Adam | 1.93 | 65.1 | 2025 | 65 | 8 | 4 | .667 | 0 | 70 | 0 | 0 | 0 | 50 | 14 | 18 | 4 | 25 | 3 | 4 | 3 | 270 | 3 | 9.64 | 3.44 | 2.80 | 0.55 | 25.9 | 9.3 | 1.15 | .274 | 2.48 | 6.89 | |
| 11 | | M. Svanson | 1.94 | 60.1 | 2025 | 39 | 4 | 0 | 1.000 | 0 | 68 | 0 | 0 | 0 | 33 | 13 | 14 | 3 | 20 | 4 | 10 | 0 | 234 | 1 | 10.14 | 2.98 | 3.40 | 0.45 | 29.1 | 8.5 | 0.88 | .216 | 2.09 | 4.92 | |
| 12 | | D. Pomeranz | 1.94 | 46.1 | 2025 | 53 | 2 | 2 | .500 | 0 | 53 | 0 | 0 | 1 | 36 | 10 | 12 | 5 | 13 | 5 | 11 | 1 | 190 | 1 | 10.29 | 2.53 | 4.08 | 0.97 | 27.9 | 6.8 | 1.06 | .272 | 2.33 | 6.99 | |
| 13 | | T. Rogers | 1.98 | 77.1 | 2025 | TOT | 81 | 4 | 6 | .400 | 0 | 48 | 0 | 0 | 0 | 66 | 17 | 20 | 4 | 7 | 1 | 13 | 0 | 299 | 0 | 5.59 | 0.81 | 6.86 | 0.47 | 16.1 | 2.3 | 0.94 | .259 | 2.33 | 7.68 |
| 14 | | T. Nance | 1.99 | 31.2 | 2025 | 30 | 2 | 0 | 1.000 | 0 | 32 | 0 | 0 | 0 | 25 | 7 | 11 | 0 | 7 | 1 | 9 | 0 | 126 | 1 | 9.09 | 1.99 | 4.57 | 0.00 | 25.4 | 5.6 | 1.01 | .291 | 3.13 | 7.11 | |
| 15 | | M. Vasil | 2.00 | 90.0 | 2025 | 44 | 5 | 3 | .625 | 0 | 71 | 0 | 0 | 4 | 60 | 20 | 24 | 5 | 46 | 6 | 17 | 5 | 371 | 4 | 7.10 | 4.60 | 1.54 | 0.50 | 19.1 | 12.4 | 1.18 | .226 | 2.40 | 6.00 | |
| 16 | | N. Enright | 2.03 | 31.0 | 2025 | 27 | 2 | 1 | .667 | 0 | 30 | 0 | 0 | 1 | 24 | 7 | 8 | 3 | 12 | 2 | 8 | 0 | 127 | 0 | 8.71 | 3.48 | 2.50 | 0.87 | 23.6 | 9.4 | 1.16 | .263 | 2.32 | 6.97 | |
| 17 |  | J. Hader | 2.05 | 52.2 | 2025 | 48 | 6 | 2 | .750 | 0 | 76 | 0 | 0 | 28 | 29 | 12 | 16 | 8 | 16 | 2 | 41 | 1 | 206 | 2 | 12.99 | 2.73 | 4.75 | 1.37 | 36.9 | 7.8 | 0.85 | .202 | 2.73 | 4.96 | |
| 18 | | J. Duran | 2.06 | 70.0 | 2025 | TOT | 72 | 7 | 6 | .538 | 0 | 80 | 0 | 0 | 32 | 58 | 16 | 19 | 3 | 19 | 3 | 55 | 4 | 287 | 3 | 10.29 | 2.44 | 4.21 | 0.39 | 27.9 | 6.6 | 1.10 | .302 | 2.44 | 7.46 |
| 19 | | R. O'Brien | 2.06 | 48.0 | 2025 | 42 | 3 | 1 | .750 | 0 | 45 | 0 | 0 | 6 | 33 | 11 | 13 | 2 | 22 | 7 | 15 | 2 | 199 | 3 | 8.44 | 4.13 | 2.05 | 0.38 | 22.6 | 11.1 | 1.15 | .252 | 2.44 | 6.19 | |
| 20 | | J. Romero | 2.07 | 61.0 | 2025 | 65 | 4 | 6 | .400 | 0 | 55 | 0 | 0 | 8 | 47 | 14 | 21 | 2 | 29 | 2 | 16 | 5 | 255 | 2 | 8.11 | 4.28 | 1.90 | 0.30 | 21.6 | 11.4 | 1.25 | .269 | 3.10 | 6.93 | |
| 21 | | A. Morejon | 2.08 | 73.2 | 2025 | 75 | 13 | 6 | .684 | 0 | 70 | 0 | 0 | 3 | 49 | 17 | 23 | 2 | 17 | 0 | 9 | 3 | 286 | 2 | 8.55 | 2.08 | 4.12 | 0.24 | 24.5 | 5.9 | 0.90 | .239 | 2.81 | 5.99 | |
| 22 | | M. RodrÃguez | 2.08 | 30.1 | 2025 | 31 | 1 | 2 | .333 | 0 | 25 | 0 | 0 | 0 | 26 | 7 | 9 | 2 | 6 | 1 | 4 | 0 | 121 | 1 | 7.42 | 1.78 | 4.17 | 0.59 | 20.7 | 5.0 | 1.05 | .276 | 2.67 | 7.71 | |
| 23 | | B. Keller | 2.10 | 68.2 | 2025 | 67 | 4 | 2 | .667 | 0 | 73 | 0 | 0 | 3 | 45 | 16 | 18 | 4 | 22 | 6 | 12 | 0 | 273 | 1 | 9.57 | 2.88 | 3.32 | 0.52 | 26.7 | 8.1 | 0.98 | .244 | 2.36 | 5.90 | |
| 24 | | D. Coulombe | 2.14 | 42.0 | 2025 | TOT | 54 | 2 | 1 | .667 | 0 | 41 | 0 | 0 | 2 | 30 | 10 | 10 | 3 | 18 | 0 | 10 | 0 | 171 | 1 | 8.79 | 3.86 | 2.28 | 0.64 | 24.0 | 10.5 | 1.14 | .248 | 2.14 | 6.43 |
| 25 | | C. Mlodzinski | 2.15 | 50.1 | 2025 | 22 | 4 | 4 | .500 | 0 | 53 | 0 | 0 | 0 | 44 | 12 | 14 | 3 | 11 | 3 | 7 | 0 | 204 | 4 | 9.48 | 1.97 | 4.82 | 0.54 | 26.0 | 5.4 | 1.09 | .306 | 2.50 | 7.87 | |
BOS
SFG
TEX
NYM
MIL
SEA
TOR
SDP
STL
CHC
CWS
CLE
HOU
TBR
PITStatMuse has game-level data for ERA and innings pitched going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
More Red Sox Stats
Team Batting Leaders 
HR
3
Abreu
RBI
17
Story
AVG
.314
Abreu
Team Pitching Leaders 
W
2
Crochet
K
22
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ERA
1.74
Morán
Team Rankings
HR
12
29th
R
78
21st
SO
148
26th
ERA
4.27
22nd
Yankees
Orioles
DET
MLB 2026 Batting Leaders
MLB 2026 Pitching Leaders
MLB Fantasy 2026
MLB 2026 Betting
MLB 2026 Standings
| NL East | W | L | PCT | GB |
|---|---|---|---|---|
13 | 7 | .650 | ||
9 | 11 | .450 | 4.0 | |
9 | 11 | .450 | 4.0 | |
8 | 11 | .421 | 4.5 | |
7 | 13 | .350 | 6.0 | |
| NL Central | W | L | PCT | GB |
12 | 8 | .600 | ||
12 | 8 | .600 | ||
11 | 8 | .579 | 0.5 | |
11 | 8 | .579 | 0.5 | |
10 | 9 | .526 | 1.5 | |
| NL West | W | L | PCT | GB |
15 | 4 | .789 | ||
13 | 7 | .650 | 2.5 | |
12 | 8 | .600 | 3.5 | |
8 | 12 | .400 | 7.5 | |
7 | 13 | .350 | 8.5 |
Braves
Marlins
Nationals
Phillies
Reds
Dodgers
Diamondbacks
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
11 | 8 | .579 | ||
11 | 9 | .550 | 0.5 | |
10 | 10 | .500 | 1.5 | |
8 | 11 | .421 | 3.0 | |
7 | 12 | .368 | 4.0 | |
| AL Central | W | L | PCT | GB |
11 | 9 | .550 | ||
11 | 10 | .524 | 0.5 | |
10 | 10 | .500 | 1.0 | |
7 | 13 | .350 | 4.0 | |
7 | 13 | .350 | 4.0 | |
| AL West | W | L | PCT | GB |
11 | 9 | .550 | ||
11 | 10 | .524 | 0.5 | |
10 | 10 | .500 | 1.0 | |
8 | 13 | .381 | 3.5 | |
8 | 13 | .381 | 3.5 |
Twins
Royals
Angels
Athletics
