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

Red Sox at Mariners

2:10 am • NESN

Boston Red Sox

@

Seattle Mariners

pitcher		team	era	w-l
E.Hancock			0.00	0-0
C.Early			0.00	0-0

MatchupOpenSpreadTotalMoneyline
Red Sox 29-43	N/A	N/A	N/A
Mariners 39-37	N/A	N/A	N/A

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Sunday 2:10 a.m.

June 21, 2026

T-Mobile ParkSeattle

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74°Fahrenheit

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0%Rain

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7Wind

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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 18 of Mariners' 38 last games at home

Against the Spread (ATS) History

	overall	home	away	favorite	underdog
Mariners	29-47	14-24	15-23	27-43	2-4
Red Sox	28-44	12-25	16-19	17-29	10-15

Over/Under History

	overall	home o/u	away o/u	favorite o/u	underdog o/u
Mariners	36-37-3	18-19-1	18-18-2	34-33-3	2-4
Red Sox	32-37-3	13-22-2	19-15-1	20-24-2	12-12-1

Straight-Up (ML) History

	overall	home	away	favorite	underdog
Mariners	39-37	21-17	18-20	37-33	2-4
Red Sox	29-43	12-25	17-18	19-27	9-16

date	opponent	score	spread	over/under	moneyline
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
Jun 13th	@WSH	L 3-8	-1.5 L	O 9	WSH -105

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

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MatchupOverUnder
Red Sox 29-43	N/A	N/A
Mariners 39-37	N/A	N/A