Boston Red Sox vs Seattle Mariners Prediction 6/19/2026 Today’s MLB Picks
Chris Ruffolo
Jun 12, 2026; Washington, District of Columbia, USA; Seattle Mariners pitcher Bryce Miller (50) throws a pitch against the Washington Nationals during the first inning at Nationals Park. Mandatory Credit: Rafael Suanes-Imagn Images
MATCHUP
Boston Red Sox
Seattle Mariners
Team Records
29-43
39-37
Spread
-1.5 175
+1.5 -214
Moneyline
-107
-112
Total
Over 6.5 (-118)
Under 6.5 (-102)
Where
Seattle Stadium
When
Friday, June 19, 2026
Time
10:10 PM EDT
TV
MLB.TV
The Boston Red Sox and the Seattle Mariners meet Friday in MLB action from T-Mobile Park. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Boston Red Sox vs. Seattle Mariners prediction.
Starting Pitching Matchup
The Boston Red Sox will send out Ranger Suarez for the start and is 2-3 with a 3.21 ERA and 70 strikeouts this season. Bryce Miller will start for Seattle and is 3-0 with a 1.54 ERA and 36 strikeouts this season.
Boston Red Sox Recap
The Boston Red Sox come into this game looking to bounce back from a 4-3 loss at the hands of the Toronto Blue Jays last time out to sit at 29-43 this season. After this series, the Red Sox will head on the road for a series against the Colorado Rockies.
Red Sox Lose 4 In A Row
Wilyer Abreu leads the Red Sox with 76 hits including 16 doubles, a triple, 8 home runs and 34 RBIs while Trevor Story has 34 hits with 7 doubles, 3 homers and 19 RBIs and Marcelo Mayer’s added 40 hits with 7 doubles, 3 home runs and 18 RBIs as well. Roman Anthony has 25 hits with 5 doubles, a triple, a home run and 5 RBIs so far this season while Jarren Duran has 57 hits with 9 doubles, 12 home runs and 37 RBIs as well this season. Willson Contreras has added 72 hits with 11 doubles, 16 homers and 44 RBIs of his own on the year.
Seattle Mariners Recap
The Seattle Mariners come into this game looking to add on to their 3-0 win over the Orioles from Thursday to improve to 39-37 this season. After this series, the Mariners will head on the road for a series against the Pittsburgh Pirates.
Mariners Alternate Wins & Losses In 4 Straight
Going into Thursday, Luke Raley has 14 home runs and 35 RBIs this season. Cole Young’s added 70 hits with 10 doubles, a triple, 6 home runs and 33 RBIs and Cal Raleigh has 28 hits with 4 doubles, 7 home runs and 20 RBIs as well this season. Randy Arozarena has 76 hits with 18 doubles, 7 home runs and 33 RBIs as well on the year. Josh Naylor also has 68 hits with 8 home runs and 32 RBIs as well on the year. Julio Rodriguez has also added 75 hits with 15 doubles, 13 home runs and 36 RBIs.
Boston Red Sox @ Seattle Mariners Betting Trends: June 19, 2026
Probable Starting Pitcher: Bryce Miller Record this season: 3-0 ERA: 1.54
Home Record: 0-0
Last 5 against Red Sox: 0-3
Why the Seattle Mariners will win
The Red Sox have lost seven of their last eight road games against AL West opponents following a loss.
The Mariners have won five of their last six home games against AL East opponents that held a losing record.
The Red Sox have failed to cover the run line in seven of their last eight road games against AL West opponents following a loss.
The Mariners have covered the run line in four of their last five home games against AL East opponents that held a losing record.
The Red Sox have lost the first inning in each of their last four road games against AL West opponents.
The Red Sox have trailed after 3 innings in each of their last four games.
The Red Sox have trailed after 5 innings in each of their last four games.
Probable Starting Pitcher: Ranger Suarez Record this season: 2-3 ERA: 3.21
Road Record: 2-1
Last 5 against Mariners: 2-0
Why the Boston Red Sox will win
The Mariners have lost seven of their last eight games as favorites against the Red Sox following a home win.
The underdogs have won three of the Red Sox’s last four games.
The Mariners have failed to cover the run line in each of their last eight games against the Red Sox following a home win.
The road team has covered the run line in each of the Red Sox’s last four games.
The Mariners have trailed after 3 innings in 10 of their last 13 games as favorites against AL East opponents.
The Red Sox have led after 5 innings in five of their last six games at T-Mobile Park against opponents that held a winning record.
Total Runs Facts
Eight of the Red Sox’s last nine night games as underdogs have gone UNDER the total runs line.
Five of the last six games between the Red Sox and Mariners at T-Mobile Park have gone UNDER the total runs line.
There has been at least one run scored in the first inning in each of the Red Sox’s last seven road games against AL West opponents.
There has been at least one run scored in the first inning in 17 of the Mariners’ last 19 games as home favorites against American League opponents.
Seattle Mariners Player Prop Facts
Cal Raleigh has hit a home run in four of the Mariners’ last seven home games against AL East opponents that held a losing record.
Julio Rodriguez has recorded at least one hit in each of his last 18 home appearances against AL opponents.
Bryce Miller has recorded five or more strikeouts in 11 of his last 12 home appearances against AL opponents that held a losing record.
Bryce Miller has recorded a win in three of his last four appearances.
Boston Red Sox Player Prop Facts
Ranger Suarez has recorded six or more strikeouts in each of his last five appearances with his team as a road underdog against AL opponents.
Willson Contreras has recorded at least one hit in each of the Red Sox’s last eight games against AL West opponents.
Triston Casas has hit a home run in each of his last three appearances in night games against AL West teams that held a winning record.
Matchup/League Facts
The Mariners rank 1st in the league for walks allowed this season (196).
The Mariners rank 28th in the league for doubles this season (97).
The Red Sox rank 30th in the league for RBIs this season (271).
The Red Sox rank 29th in the league for runs scored this season (282).
Boston Red Sox vs. Seattle Mariners Prediction
I’m on the Mariners in this one. I get the case to be made for Boston with Ranger Suarez pitching, and Suarez is always capable of tossing a gem, but Seattle has decent numbers against left-handed pitching and until Bryce Miller gives me a reason to not buy into what he’s selling right now, I’m going to keep believing in it. Give me the Mariners.
