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Boston Red Sox vs Seattle Mariners

Saturday, Jun 20, 2026T-Mobile ParkFinal
BOS · Away · 60-51

Boston Red Sox

AL East · 5th · 5.5 GB
5:1
Final
H2H 33
SEA · Home · 55-58

Seattle Mariners

Starting pitchers
Starter form · last 5 starts
Season3.64
Last 52.96
0.68 ERA better in last 5
83 days restQS 33.3%Blow-up 0/5
304/21
104/15
104/10
204/04
103/29

↓ ERA trending down lately

Season3.60
Last 52.87
0.73 ERA better in last 5
83 days restQS 66.7%Blow-up 0/5
304/20
204/15
304/10
104/04
003/29

↓ ERA trending down lately

Matchup edge
Emerson Hancock hotter lately (L5 2.87 ERA)·Seattle 46 L10
PitchingSeattle
Boston61Seattle68
HittingSeattle
Boston15Seattle22
BullpenBoston
Boston69Seattle63
Projected hitters vs RHP / LHP
Boston vs RHP
Avg OPS 0.645Top: Seigler 0.804 · Rafaela 0.748 · Durbin 0.604

Projected sample — season splits vs pitcher hand, not official order.

Seattle vs LHP
Avg OPS 0.561Top: Canzone 0.600 · Young 0.593 · Joe 0.587

Projected sample — season splits vs pitcher hand, not official order.

Boston Red Sox hitters vs RHP (projected)
Batter
AVG
OPS
HR
0.286
0.804
0
0.201
0.604
4
0.173
0.510
2
0.278
0.748
5
Seattle Mariners hitters vs LHP (projected)
Batter
AVG
OPS
HR
0.163
0.483
1
0.218
0.593
2
0.115
0.541
1
0.136
0.587
1
0.200
0.600
0
◆ Matchup preview

Boston Red Sox at Seattle Mariners (2026-06-20). Connelly Early vs Emerson Hancock at T-Mobile Park.

Connelly Early, the Red Sox's left-hander, enters this contest with a 3.81 ERA and a 1.32 WHIP over 75.2 innings pitched this season, showing a strikeout rate of 8.56 K/9 and a walk rate of 3.45 BB/9. His recent starts indicate a downward trend in ERA, with his last five outings averaging a 2.29 ERA, and he has maintained a stable alternating pattern in performance. Emerson Hancock, the Mariners' right-hander, boasts a more impressive 3.28 ERA and a 1.02 WHIP across 79.2 innings, featuring an 8.47 K/9 and a significantly lower 1.92 BB/9. Hancock also shows a downward trend in his ERA over his recent starts, with his last five averaging a 1.57 ERA, and he has a higher quality start percentage at 66.7 compared to Early's 33.3.

The Red Sox offense has posted a .695 OPS and scored 288 runs this season, with a .245 batting average. Their pitching staff holds a 3.90 ERA and a 1.27 WHIP, allowing 81 home runs. The Mariners' offense, by comparison, has a slightly better .705 OPS and has scored 322 runs, despite a lower .234 batting average, showing more power with 97 home runs. Seattle's pitching unit has a stronger 3.64 ERA and a 1.18 WHIP, having given up 75 home runs.

In their recent head-to-head matchups from 2025, the Red Sox and Mariners split their six games, with both teams securing three wins. The scores from these contests were relatively low, with four of the six games featuring five or fewer total runs. The current total line for this game is set at 7.0, which aligns with the historical trend of lower-scoring affairs between these two teams and the solid pitching performances expected from both Early and Hancock, who have demonstrated good form recently.

Key facts
Connelly Early 3.81 ERAEmerson Hancock 3.28 ERARed Sox 0.695 OPSMariners 0.705 OPSTotal 7.0
◆ Lineup notes

Away batters facing Emerson Hancock (RHP) have limited history against him. Jarren Duran has been successful in his three plate appearances, going 2-for-3 with a 1.667 OPS. Wilyer Abreu is 0-for-3 in his three plate appearances, resulting in a .000 OPS. Willson Contreras is hitless in his lone plate appearance, going 0-for-1 with a .000 OPS. Anthony Seigler, Masataka Yoshida, Caleb Durbin, Marcelo Mayer, Carlos Narváez, and Nate Eaton have no MLB history against Hancock.

Home batters facing Connelly Early (LHP) have no prior MLB history against him. J.P. Crawford, Cal Raleigh, Julio Rodríguez, Josh Naylor, Rob Refsnyder, Cole Young, Mitch Garver, Connor Joe, and Colt Emerson have never faced Early in a major league game.

The away lineup has a slight advantage in terms of prior experience, with a few batters having faced Emerson Hancock, while none of the home batters have any history against Connelly Early.

Head to head (2025–2026)
33
Series tied
6 meetings total
2025-06-18
Boston Red Sox @ Seattle Mariners
31
BOS
2025-06-17
Boston Red Sox @ Seattle Mariners
08
SEA
2025-06-16
Boston Red Sox @ Seattle Mariners
20
BOS
2025-04-24
Seattle Mariners @ Boston Red Sox
43
SEA
2025-04-23
Seattle Mariners @ Boston Red Sox
85
SEA
Team picture · 2026
28
WLLLLLWLLL
46
LWLWWLLWLL
BOS
SEA
Team AVG
0.244
0.232
Team OPS
0.694
0.701
Home runs
63
97
Runs scored
293
323
Team ERA
3.86
3.66
HR allowed
81
76

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