Boston Red Sox vs Seattle Mariners Prediction & Picks - MLB

USA - MLB

Boston Red Sox
6/16/25 21:40
Seattle Mariners

Prediction:

 

Mariners -1.5.

+118
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 by Carlos Zabala in MLB Picks

Without a break, the Red Sox head to T-Mobile Park for another week of MLB action in a new series against the Mariners. They've done so on a very high note in recent games, having won 5 of 6 against their bitter rivals, the Yankees, in New York and at Fenway Park. In between those two series, they also won another one against the Rays.

The Red Sox won Sunday's game 2-0 behind a superb performance by Brayan Bello, who pitched 7 scoreless innings and struck out 8. Devers hit his 15th home run of the season off a Max Fried pitch, and that RBI, along with another by Story, was enough to give the Yankees left-hander his second loss of the season.

The Red Sox have won five straight, but the Mariners have a three-game winning streak after sweeping the Guardians, atoning for their loss to the Diamondbacks in Arizona.

The tentative pitching matchup is Lucas Giolito for the Red Sox against Logan Gilbert for the Mariners.

Boston Red Sox vs Seattle Mariners Form

Table

Teams % P W L
13
Seattle Mariners
Seattle Mariners
0.514 70 36 34
16
Boston Red Sox
Boston Red Sox
0.507 73 37 36

Boston Red Sox and Seattle Mariners Latest Matches

Boston Red Sox
Boston Red Sox Latest matches
L W W W W W
Victories

5/6 (83%)

Defeats

1/6 (17%)

Jun 15, 2025 - MLB

New York Yankees
0 :  2
Boston Red Sox

Jun 14, 2025 - MLB

New York Yankees
3 :  4
Boston Red Sox

Jun 13, 2025 - MLB

New York Yankees
1 :  2
Boston Red Sox

Jun 11, 2025 - MLB

Tampa Bay Rays
3 :  4
Boston Red Sox

Jun 10, 2025 - MLB

Tampa Bay Rays
1 :  3
Boston Red Sox

Jun 9, 2025 - MLB

Tampa Bay Rays
10 :  8
Boston Red Sox
L W W W W W
Victories

5/6 (83%)

Defeats

1/6 (17%)

Jun 15, 2025 - MLB

New York Yankees
0 :  2
Boston Red Sox

Jun 14, 2025 - MLB

New York Yankees
3 :  4
Boston Red Sox

Jun 13, 2025 - MLB

New York Yankees
1 :  2
Boston Red Sox

Jun 11, 2025 - MLB

Tampa Bay Rays
3 :  4
Boston Red Sox

Jun 10, 2025 - MLB

Tampa Bay Rays
1 :  3
Boston Red Sox

Jun 9, 2025 - MLB

Tampa Bay Rays
10 :  8
Boston Red Sox
W L W L W W
Victories

4/6 (67%)

Defeats

2/6 (33%)

Jun 8, 2025 - MLB

Boston Red Sox
11 :  7
New York Yankees

Jun 7, 2025 - MLB

Boston Red Sox
10 :  7
New York Yankees

Jun 6, 2025 - MLB

Boston Red Sox
6 :  9
New York Yankees

Jun 1, 2025 - MLB

Boston Red Sox
3 :  1
Atlanta Braves

May 31, 2025 - MLB

Boston Red Sox
0 :  5
Atlanta Braves

May 30, 2025 - MLB

Boston Red Sox
5 :  1
Atlanta Braves
Seattle Mariners
Seattle Mariners Latest matches
L L L W W W
Victories

3/6 (50%)

Defeats

3/6 (50%)

Jun 15, 2025 - MLB

Cleveland Guardians
0 :  6
Seattle Mariners

Jun 14, 2025 - MLB

Cleveland Guardians
3 :  4
Seattle Mariners

Jun 13, 2025 - MLB

Cleveland Guardians
2 :  7
Seattle Mariners

Jun 11, 2025 - MLB

Seattle Mariners
2 :  5
Arizona Diamondbacks

Jun 10, 2025 - MLB

Seattle Mariners
3 :  10
Arizona Diamondbacks

Jun 9, 2025 - MLB

Seattle Mariners
4 :  8
Arizona Diamondbacks
L L L W W W
Victories

3/6 (50%)

Defeats

3/6 (50%)

Jun 15, 2025 - MLB

Cleveland Guardians
0 :  6
Seattle Mariners

Jun 14, 2025 - MLB

Cleveland Guardians
3 :  4
Seattle Mariners

Jun 13, 2025 - MLB

Cleveland Guardians
2 :  7
Seattle Mariners

Jun 5, 2025 - MLB

Baltimore Orioles
4 :  3
Seattle Mariners

Jun 4, 2025 - MLB

Baltimore Orioles
3 :  2
Seattle Mariners

Jun 3, 2025 - MLB

Baltimore Orioles
5 :  1
Seattle Mariners
L W L L L L
Victories

1/6 (17%)

Defeats

5/6 (83%)

Jun 11, 2025 - MLB

Seattle Mariners
2 :  5
Arizona Diamondbacks

Jun 10, 2025 - MLB

Seattle Mariners
3 :  10
Arizona Diamondbacks

Jun 9, 2025 - MLB

Seattle Mariners
4 :  8
Arizona Diamondbacks

Jun 8, 2025 - MLB

Seattle Mariners
3 :  2
Los Angeles Angels

Jun 7, 2025 - MLB

Seattle Mariners
6 :  8
Los Angeles Angels

Jun 6, 2025 - MLB

Seattle Mariners
4 :  5
Los Angeles Angels

Boston Red Sox against Seattle Mariners : Head to Head (H2H)

Boston Red Sox

50 %

Seattle Mariners

50 %

Apr 24, 2025 - MLB

Seattle Mariners
4 :  3
Boston Red Sox

Apr 23, 2025 - MLB

Seattle Mariners
8 :  5
Boston Red Sox

Apr 22, 2025 - MLB

Seattle Mariners
3 :  8
Boston Red Sox

Jul 31, 2024 - MLB

Seattle Mariners
2 :  3
Boston Red Sox

Jul 30, 2024 - MLB

Seattle Mariners
10 :  6
Boston Red Sox

Jul 29, 2024 - MLB

Seattle Mariners
7 :  14
Boston Red Sox

Boston Red Sox - Seattle Mariners Key Points

  1. The Red Sox's OBP this season is .328
  2. The Mariners' FLD% is third-best in MLB
  3. Alex Bregman and Triston Casas are out for the Red Sox due to injuries
  4. The Mariners have not allowed more than 3 ERs to the Guardians in their previous 3 games

Our Boston Red Sox vs Seattle Mariners Prediction

Both the Red Sox and Mariners are nearing the 70-game mark this season, and both are very close to a .500 win percentage. That's precisely the mark Cora's team hasn't been able to consistently surpass, a trend that has been going on since 2024. Monday's pitching duel favors the Mariners, who also pitched very well against the Guardians in Seattle. Our prediction for Mariners vs Red Sox is: Mariners -1.5.

Prediction:

 

Mariners -1.5.

+118
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Boston Red Sox vs Seattle Mariners Picks