I didn't find anything for this season, but Aroldis Chapman had the best ERA by a relief pitcher with 25.0+ innings pitched in 2025, with an ERA of 1.17.
Interpreted as:
relief pitchers with lowest era with atleast 25 or more 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 |  | A. Saalfrank | 1.24 | 29.0 | 2025 | 28 | 2 | 1 | .667 | 0 | 19 | 0 | 0 | 3 | 19 | 4 | 5 | 1 | 10 | 0 | 10 | 1 | 113 | 2 | 5.90 | 3.10 | 1.90 | 0.31 | 16.8 | 8.8 | 1.00 | .217 | 1.55 | 5.90 | |
| 3 | | 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 | |
| 4 | | 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 | |
| 5 |  | E. Díaz | 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 | |
| 6 | | 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 | |
| 7 | | K. Strowd | 1.71 | 26.1 | 2025 | 25 | 0 | 1 | .000 | 0 | 24 | 0 | 0 | 0 | 16 | 5 | 6 | 1 | 13 | 1 | 6 | 0 | 105 | 2 | 8.20 | 4.44 | 1.85 | 0.34 | 22.9 | 12.4 | 1.10 | .227 | 2.05 | 5.47 | |
| 8 |  | 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 | |
| 9 | | 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 | |
| 10 | | R. Rodríguez | 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 | |
| 11 | | E. Sabrowski | 1.84 | 29.1 | 2025 | 33 | 0 | 1 | .000 | 0 | 42 | 0 | 0 | 0 | 14 | 6 | 8 | 2 | 21 | 3 | 3 | 0 | 121 | 0 | 12.89 | 6.44 | 2.00 | 0.61 | 34.7 | 17.4 | 1.19 | .226 | 2.45 | 4.30 | |
| 12 | | 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 | |
| 13 | | T. Myers | 1.91 | 28.1 | 2025 | 16 | 0 | 1 | .000 | 0 | 20 | 0 | 0 | 0 | 23 | 6 | 7 | 1 | 3 | 1 | 8 | 0 | 110 | 0 | 6.35 | 0.95 | 6.67 | 0.32 | 18.2 | 2.7 | 0.92 | .259 | 2.22 | 7.31 | |
| 14 | | 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 | |
| 15 | | 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 | |
| 16 | | 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 | |
| 17 | | 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 |
| 18 | | 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 | |
| 19 | | 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 | |
| 20 | | 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 | |
| 21 |  | 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 | |
| 22 | | 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 |
| 23 | | 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 | |
| 24 | | 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 | |
| 25 | | 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 | |
BOS
AZ
SFG
TEX
NYM
MIL
BAL
SEA
TOR
CLE
SDP
STL
CHC
CWS
HOUStatMuse 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
9
Abreu
AVG
.392
Abreu
Team Pitching Leaders 
W
2
Crochet
K
22
Crochet
ERA
2.25
Morán
Team Rankings
HR
9
25th
R
46
25th
SO
111
18th
ERA
4.13
20th
Yankees
Rays
MIN
MLB 2026 Batting Leaders
MLB 2026 Pitching Leaders
MLB Fantasy 2026
MLB 2026 Betting
MLB 2026 Standings
| NL East | W | L | PCT | GB |
|---|---|---|---|---|
9 | 5 | .643 | ||
8 | 6 | .571 | 1.0 | |
7 | 7 | .500 | 2.0 | |
6 | 7 | .462 | 2.5 | |
5 | 8 | .385 | 3.5 | |
| NL Central | W | L | PCT | GB |
8 | 5 | .615 | ||
8 | 5 | .615 | ||
8 | 5 | .615 | ||
8 | 6 | .571 | 0.5 | |
6 | 7 | .462 | 2.0 | |
| NL West | W | L | PCT | GB |
9 | 3 | .750 | ||
8 | 6 | .571 | 2.0 | |
7 | 6 | .538 | 2.5 | |
6 | 7 | .462 | 3.5 | |
6 | 8 | .429 | 4.0 |
Braves
Marlins
Phillies
Nationals
Pirates
Reds
Dodgers
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
8 | 5 | .615 | ||
6 | 7 | .462 | 2.0 | |
6 | 7 | .462 | 2.0 | |
6 | 7 | .462 | 2.0 | |
4 | 9 | .308 | 4.0 | |
| AL Central | W | L | PCT | GB |
8 | 6 | .571 | ||
7 | 7 | .500 | 1.0 | |
6 | 8 | .429 | 2.0 | |
5 | 9 | .357 | 3.0 | |
5 | 9 | .357 | 3.0 | |
| AL West | W | L | PCT | GB |
7 | 5 | .583 | ||
7 | 7 | .500 | 1.0 | |
6 | 7 | .462 | 1.5 | |
6 | 7 | .462 | 1.5 | |
4 | 9 | .308 | 3.5 |
Royals
Tigers
Angels
Athletics
