Aroldis Chapman had the lowest ERA by a relief pitcher with 50.0+ innings pitched in 2025, with an ERA of 1.17.
| 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. 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 | |
| 3 |  | 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 | |
| 4 |  | 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 | |
| 5 | | 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 | |
| 6 | | 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 | |
| 7 | | 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 | |
| 8 | | 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 |
| 9 | | 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 | |
| 10 |  | 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 | |
| 11 | | 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 |
| 12 | | 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 | |
| 13 | | 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 | |
| 14 | | 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 | |
| 15 | | 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 | |
| 16 | | A. Bender | 2.16 | 50.0 | 2025 | 51 | 3 | 5 | .375 | 0 | 42 | 0 | 0 | 4 | 32 | 12 | 13 | 3 | 21 | 2 | 12 | 2 | 204 | 1 | 7.56 | 3.78 | 2.00 | 0.54 | 20.6 | 10.3 | 1.06 | .213 | 2.34 | 5.76 | |
| 17 | | D. Santana | 2.18 | 70.1 | 2025 | 70 | 4 | 5 | .444 | 0 | 60 | 0 | 0 | 16 | 44 | 17 | 18 | 5 | 17 | 3 | 34 | 0 | 270 | 0 | 7.68 | 2.18 | 3.53 | 0.64 | 22.2 | 6.3 | 0.87 | .211 | 2.30 | 5.63 | |
| 18 | | S. Newcomb | 2.19 | 70.0 | 2025 | TOT | 43 | 2 | 2 | .500 | 0 | 64 | 0 | 0 | 2 | 62 | 17 | 21 | 4 | 20 | 4 | 11 | 2 | 286 | 2 | 8.23 | 2.57 | 3.20 | 0.51 | 22.4 | 7.0 | 1.17 | .299 | 2.70 | 7.97 |
| 19 | | S. Armstrong | 2.19 | 70.0 | 2025 | 69 | 4 | 2 | .667 | 0 | 68 | 0 | 0 | 9 | 39 | 17 | 19 | 4 | 19 | 6 | 22 | 0 | 270 | 3 | 8.74 | 2.44 | 3.58 | 0.51 | 25.2 | 7.0 | 0.83 | .202 | 2.44 | 5.01 | |
| 20 | | R. Henriquez | 2.22 | 73.0 | 2025 | 69 | 7 | 1 | .875 | 0 | 98 | 0 | 0 | 7 | 53 | 18 | 23 | 8 | 27 | 4 | 9 | 2 | 303 | 2 | 12.08 | 3.33 | 3.63 | 0.99 | 32.3 | 8.9 | 1.10 | .271 | 2.84 | 6.53 | |
| 21 | | A. Ashby | 2.23 | 64.2 | 2025 | 42 | 5 | 2 | .714 | 0 | 73 | 0 | 0 | 3 | 54 | 16 | 16 | 3 | 24 | 4 | 9 | 0 | 264 | 6 | 10.16 | 3.34 | 3.04 | 0.42 | 27.7 | 9.1 | 1.21 | .319 | 2.23 | 7.52 | |
| 22 | | G. Whitlock | 2.25 | 72.0 | 2025 | 62 | 7 | 3 | .700 | 0 | 91 | 0 | 0 | 1 | 54 | 18 | 21 | 2 | 24 | 5 | 9 | 2 | 293 | 3 | 11.38 | 3.00 | 3.79 | 0.25 | 31.1 | 8.2 | 1.08 | .304 | 2.63 | 6.75 | |
| 23 | | B. Abreu | 2.28 | 71.0 | 2025 | 70 | 3 | 4 | .429 | 0 | 105 | 0 | 0 | 7 | 51 | 18 | 18 | 4 | 31 | 4 | 19 | 0 | 296 | 4 | 13.31 | 3.93 | 3.39 | 0.51 | 35.5 | 10.5 | 1.15 | .309 | 2.28 | 6.46 | |
| 24 | | D. Bednar | 2.30 | 62.2 | 2025 | TOT | 64 | 6 | 5 | .545 | 0 | 86 | 0 | 0 | 27 | 46 | 16 | 18 | 4 | 19 | 1 | 51 | 2 | 251 | 4 | 12.35 | 2.73 | 4.53 | 0.57 | 34.3 | 7.6 | 1.04 | .298 | 2.59 | 6.61 |
| 25 | | G. Cleavinger | 2.35 | 61.1 | 2025 | 67 | 2 | 6 | .250 | 0 | 82 | 0 | 0 | 2 | 40 | 16 | 17 | 9 | 18 | 7 | 9 | 0 | 243 | 1 | 12.03 | 2.64 | 4.56 | 1.32 | 33.7 | 7.4 | 0.95 | .244 | 2.49 | 5.87 | |
BOS
NYM
MIL
SEA
SFG
SDP
STL
CWS
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TBRStatMuse 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.
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More Red Sox Stats
Team Batting Leaders 
HR
18
Contreras
RBI
53
Contreras
AVG
.280
Contreras
Team Pitching Leaders 
W
9
Gray
K
93
Early
ERA
2.69
Gray
Team Rankings
HR
73
30th
R
335
29th
SO
713
15th
ERA
3.74
6th
Yankees
Blue Jays
Orioles
WSH
LAA
MLB 2026 Batting Leaders
MLB 2026 Pitching Leaders
MLB Fantasy 2026
MLB 2026 Betting
MLB 2026 Standings
| NL East | W | L | PCT | GB |
|---|---|---|---|---|
49 | 34 | .590 | ||
48 | 38 | .558 | 2.5 | |
45 | 40 | .529 | 5.0 | |
44 | 43 | .506 | 7.0 | |
36 | 50 | .419 | 14.5 | |
| NL Central | W | L | PCT | GB |
52 | 31 | .627 | ||
48 | 38 | .558 | 5.5 | |
44 | 38 | .537 | 7.5 | |
43 | 43 | .500 | 10.5 | |
39 | 45 | .464 | 13.5 | |
| NL West | W | L | PCT | GB |
55 | 30 | .647 | ||
43 | 41 | .512 | 11.5 | |
42 | 42 | .500 | 12.5 | |
35 | 49 | .417 | 19.5 | |
33 | 52 | .388 | 22.0 |
Braves
Phillies
Reds
Dodgers
Diamondbacks
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
49 | 33 | .598 | ||
48 | 37 | .565 | 2.5 | |
40 | 46 | .465 | 11.0 | |
39 | 48 | .448 | 12.5 | |
37 | 47 | .440 | 13.0 | |
| AL Central | W | L | PCT | GB |
45 | 39 | .536 | ||
44 | 42 | .512 | 2.0 | |
41 | 46 | .471 | 5.5 | |
37 | 49 | .430 | 9.0 | |
35 | 51 | .407 | 11.0 | |
| AL West | W | L | PCT | GB |
44 | 42 | .512 | ||
43 | 43 | .500 | 1.0 | |
43 | 45 | .489 | 2.0 | |
40 | 45 | .471 | 3.5 | |
36 | 50 | .419 | 8.0 |
Guardians
Twins
Tigers
Royals
Athletics