Justin Slaten had the worst ERA by a Red Sox relief pitcher with 20.0+ innings pitched this season, with an ERA of 4.60.
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| 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 |  | J. Slaten | 4.60 | 31.1 | 2026 | 36 | 2 | 4 | .333 | 0 | 39 | 0 | 0 | 0 | 35 | 16 | 20 | 4 | 8 | 0 | 3 | 0 | 137 | 0 | 11.20 | 2.30 | 4.88 | 1.15 | 28.5 | 5.8 | 1.37 | .360 | 5.74 | 10.05 | |
| 2 | | R. Watson | 4.53 | 55.2 | 2026 | 35 | 1 | 0 | 1.000 | 0 | 43 | 0 | 0 | 1 | 54 | 28 | 28 | 8 | 19 | 3 | 23 | 0 | 240 | 1 | 6.95 | 3.07 | 2.26 | 1.29 | 17.9 | 7.9 | 1.31 | .275 | 4.53 | 8.73 | |
| 3 | | D. Coulombe | 4.50 | 22.0 | 2026 | 29 | 0 | 2 | .000 | 0 | 10 | 0 | 0 | 0 | 18 | 11 | 11 | 1 | 15 | 1 | 4 | 0 | 96 | 0 | 4.09 | 6.14 | 0.67 | 0.41 | 10.4 | 15.6 | 1.50 | .246 | 4.50 | 7.36 | |
| 4 | | R. Burgos | 4.22 | 21.1 | 2026 | 9 | 0 | 0 | 0 | 16 | 0 | 0 | 2 | 17 | 10 | 11 | 3 | 1 | 0 | 9 | 0 | 82 | 0 | 6.75 | 0.42 | 16.00 | 1.27 | 19.5 | 1.2 | 0.84 | .226 | 4.64 | 7.17 | ||
| 5 | | G. Weissert | 3.26 | 60.2 | 2026 | 63 | 4 | 2 | .667 | 0 | 60 | 0 | 0 | 1 | 55 | 22 | 23 | 8 | 20 | 3 | 7 | 2 | 255 | 0 | 8.90 | 2.97 | 3.00 | 1.19 | 23.5 | 7.8 | 1.24 | .287 | 3.41 | 8.16 | |
| 6 | | T. Guerrero | 3.10 | 40.2 | 2026 | 40 | 1 | 2 | .333 | 0 | 41 | 0 | 0 | 0 | 37 | 14 | 18 | 2 | 8 | 2 | 3 | 1 | 166 | 1 | 9.07 | 1.77 | 5.13 | 0.44 | 24.7 | 4.8 | 1.11 | .310 | 3.98 | 8.19 | |
| 7 | | J. Morán | 2.59 | 62.2 | 2026 | 47 | 2 | 1 | .667 | 0 | 67 | 0 | 0 | 0 | 35 | 18 | 19 | 7 | 31 | 2 | 13 | 2 | 254 | 2 | 9.62 | 4.45 | 2.16 | 1.01 | 26.4 | 12.2 | 1.05 | .190 | 2.73 | 5.03 | |
| 8 |  | B. Bello | 1.98 | 63.2 | 2026 | 15 | 4 | 1 | .800 | 0 | 50 | 0 | 0 | 1 | 52 | 14 | 17 | 1 | 12 | 5 | 4 | 2 | 252 | 0 | 7.07 | 1.70 | 4.17 | 0.14 | 19.8 | 4.8 | 1.01 | .277 | 2.40 | 7.35 | |
| 9 |  | A. Chapman | 1.92 | 51.2 | 2026 | 53 | 3 | 4 | .429 | 0 | 71 | 0 | 0 | 35 | 35 | 11 | 13 | 3 | 23 | 1 | 44 | 0 | 213 | 3 | 12.37 | 4.01 | 3.09 | 0.52 | 33.3 | 10.8 | 1.12 | .278 | 2.26 | 6.10 | |
| 10 | | G. Whitlock | 1.72 | 52.1 | 2026 | 54 | 7 | 2 | .778 | 0 | 59 | 0 | 0 | 4 | 38 | 10 | 13 | 3 | 9 | 0 | 11 | 0 | 198 | 2 | 10.15 | 1.55 | 6.56 | 0.52 | 29.8 | 4.5 | 0.90 | .276 | 2.24 | 6.54 | |
| 11 | | A. Gamboa | 1.27 | 28.1 | 2026 | 18 | 1 | 0 | 1.000 | 0 | 20 | 0 | 0 | 1 | 22 | 4 | 5 | 1 | 10 | 1 | 11 | 0 | 112 | 0 | 6.35 | 3.18 | 2.00 | 0.32 | 17.9 | 8.9 | 1.13 | .263 | 1.59 | 6.99 |
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More Red Sox Stats
Team Batting Leaders 
HR
1
Contreras
RBI
1
Contreras
AVG
.500
Eaton
Team Pitching Leaders 
K
5
Gray
ERA
0.00
Chapman
Team Rankings
HR
163
26th
R
689
23rd
SO
1,398
11th
ERA
3.54
3rd
Orioles
Blue Jays
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 |
Marlins
Nationals
Mets
Pirates
Cardinals
Reds
Diamondbacks
Giants
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 |
Twins
Tigers
Royals
Rangers
Mariners
Athletics
Angels