Red Sox vs. Mariners Odds & Betting Predictions - June 21, 2026

Red Sox at Mariners

2:10 am • NESN

Boston Red Sox

30-43

0 - 0

Seattle Mariners

39-38

MatchupOpenSpreadTotalMoneyline
Red Sox 30-43	+1.5	+1.5-205	o7.5-110	+107
Mariners 39-38	u7.5	-1.5+169	u7.5-111	-128

Sunday 2:10 a.m.

June 21, 2026

T-Mobile ParkSeattle

E.Hancock u17.5 Outs+125

0.85u

J.Duran o0.5 HR+485

0.25u

W.Abreu o0.5 HR+475

0.5u

E.Hancock u17.5 Outs+120

0.42u

C.Early u5.5 Ks+124

0.4u

Under 7.5-120

0.6u

C.Early o6.5 Ks+120

0.83u

Under 7.5-125

1.25u

J.Rodriguez To Hit 1+ Home Runs Yes+435

Under 7.5-115

0.58u

Bet to 7 (-105)

C.Early o5.5 Ks-154

0.86u

(FD) Saturday's Leadoff

Grant's 5 Home Run Picks for Saturday
Grant Neiffer•
Jun 20, 2026 UTC
Red Sox vs Mariners: Target This Underpriced Ks Prop
Matt Trollo•
Jun 20, 2026 UTC
Opening Pitch: Zerillo’s MLB Projections for Saturday
Sean Zerillo•
Jun 20, 2026 UTC
The Leadoff: Trollo's MLB Breakdown and Bets for Saturday
Matt Trollo•
Jun 20, 2026 UTC

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No props found

MLB Public Betting

Mariners are 2-3 in their last 5 games.
Mariners are 2-3 in their last 5 games against the spread
Mariners are 15-23 in their road games against the spread
The totals have gone OVER in 3 of Mariners' last 5 games
The totals have gone OVER in 19 of Mariners' 39 last games at home

Against the Spread (ATS) History

	overall	home	away	favorite	underdog
Mariners	29-48	14-25	15-23	27-44	2-4
Red Sox	29-44	12-25	17-19	17-29	11-15

Over/Under History

	overall	home o/u	away o/u	favorite o/u	underdog o/u
Mariners	37-37-3	19-19-1	18-18-2	35-33-3	2-4
Red Sox	33-37-3	13-22-2	20-15-1	20-24-2	13-12-1

Straight-Up (ML) History

	overall	home	away	favorite	underdog
Mariners	39-38	21-18	18-20	37-34	2-4
Red Sox	30-43	12-25	18-18	19-27	10-16

date	opponent	score	spread	over/under	moneyline
Jun 20th	BOS	L 2-6	+1.5 L	O 6.5	BOS -116
Jun 18th	BAL	W 3-0	-1.5 W	U 7.5	SEA -129
Jun 18th	BAL	L 3-5	-1.5 L	O 7.5	BAL -135
Jun 17th	BAL	W 3-1	-1.5 W	U 7.5	SEA -150
Jun 14th	@WSH	L 1-10	-1.5 L	O 10.5	WSH -132

Tanner Houck
SP
Houck is out with arm
Out
Triston Casas
1B
Casas is out with knee
Out
Patrick Sandoval
SP
Sandoval is out with elbow
Out
Kutter Crawford
SP
Crawford is out with wrist
Out
Romy Gonzalez
1B
Gonzalez is out with shoulder
Out

See more MLB Injuries

PITCHER		PC	IP	K	ER
LC.Early, P		10	0.1	0	0

HITTERS	H-AB	R	HR	RBI
1A.Seigler, 2B	0-1	0	0	0
2M.Yoshida, DH	0-1	0	0	0
3W.Abreu, RF	0-1	0	0	0
4W.Contreras, 1B	-
5J.Duran, LF	-
6C.Durbin, 3B	-
7M.Mayer, SS	-
8C.Narvaez, C	-
9N.Eaton, CF	-

PITCHER		PC	IP	K	ER
RE.Hancock, P		12	1	1	0

HITTERS	H-AB	R	HR	RBI
1J.Crawford, 3B	0-0	0	0	0
2C.Raleigh, C	1-1	0	0	0
3J.Rodriguez, CF	0-1	0	0	0
4J.Naylor, 1B	-
5R.Refsnyder, RF	-
6C.Young, 2B	-
7M.Garver, DH	-
8C.Joe, LF	-
9C.Emerson, SS	-

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MatchupOverUnder
Red Sox 30-43	N/A	N/A
Mariners 39-38	N/A	N/A

Red Sox vs. Mariners Odds & Betting Predictions - June 21, 2026

Red Sox at Mariners

Boston Red Sox

Seattle Mariners

Red Sox at Mariners Odds

Spread, Total, Moneyline

Red Sox vs. Mariners Previews & Analysis

Grant's 5 Home Run Picks for Saturday

Red Sox vs Mariners: Target This Underpriced Ks Prop

Opening Pitch: Zerillo’s MLB Projections for Saturday

The Leadoff: Trollo's MLB Breakdown and Bets for Saturday

Prop Odds Comparison

Line Movement Tracker

Red Sox vs. Mariners Public Betting Percentages

Red Sox

Public

Mariners

Bets%

Money%

Betting Trends

Matchup History

Against the Spread (ATS) History

Over/Under History

Straight-Up (ML) History

Last 5 Matchups

Red Sox vs. Mariners Injury Updates

Red Sox Injuries

Mariners Injuries

Red Sox vs. Mariners Odds Comparison

Red Sox at Mariners Team Totals