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Seattle Mariners vs Boston Red Sox June 18th 2025
The Boston Red Sox will visit the Seattle Mariners at T-Mobile Park on Wednesday, June 18, 2025. The game will start at 4:10 PM, and fans can catch the action on RSNW. The weather forecast predicts a mild day with a light breeze and overcast clouds.
Boston enters the game with a 38-36 record, sitting 5 games back in the AL East. Their road record is 16-19. Seattle holds a 36-35 record and is 4 games back in the AL West. At home, they have a 19-18 record. Garrett Crochet will start for Boston, while Luis Castillo takes the mound for Seattle.
Red Sox vs Mariners Key Information
- Sport: Baseball
- Teams: Boston Red Sox vs. Seattle Mariners
- Venue: T-Mobile Park in Seattle, WA
- Date: Wednesday, June 18, 2025
- Betting Odds: Red Sox MoneyLine -124, Mariners MoneyLine +104
The Red Sox Can Win If…
The Boston Red Sox enter their next game with momentum from a 2-0 win against the Seattle Mariners. Lucas Giolito was dominant on the mound, striking out 10 over six innings. Roman Anthony and Jarren Duran contributed with key hits, each scoring a run.
The Red Sox have been strong at the plate this season, ranking first in doubles with 141. Their slugging percentage of .421 ranks fifth in the league, showing their ability to hit for power. With players like Alex Bregman and Trevor Story leading the lineup, the team has the potential to score runs in bunches.
Pitching has also been a strength, with Garrett Crochet set to start. He holds an impressive ERA of 2.24, showing his ability to keep opponents off the scoreboard. The Red Sox have managed 31 quality starts this season, ranking seventh, indicating a reliable starting rotation.
The Mariners Can Win If…
The Seattle Mariners are coming off a tough 0-2 loss against the Boston Red Sox. In that game, Logan Gilbert pitched well with 10 strikeouts over five innings. Despite the loss, the Mariners are looking to bounce back with a strong performance from their lineup.
Seattle’s offense has shown strength this season, with 90 home runs, ranking 8th in the league. Cal Raleigh leads the team with 26 home runs and a .606 slugging percentage. The Mariners also excel in stolen bases, ranking 3rd with 72, adding speed to their offensive strategy.
Luis Castillo will take the mound for the Mariners with a 3.29 ERA. Castillo’s ability to control the game will be key in keeping Boston’s hitters at bay. With a solid mix of power hitting and pitching, the Mariners have the tools to secure a win.
The Lean
The Red Sox are favored with a MoneyLine of -124 against the Mariners at +104. The Red Sox have a better batting average and slugging percentage, ranking 5th in both categories. Given these stats, my model projects the Red Sox to win with a score of 4-3. Therefore, the recommendation is to pick the Red Sox to win straight up.
The over/under line is set at 6.5 runs. The Red Sox and Mariners have similar earned run averages, ranking 16th and 17th, respectively. My model projects a total score of 7 runs. Based on this projection, the recommendation is to take the over on the total runs.
Stay Ahead of the Diamond
MLB Data & Insights
Aces on the Mound as Red Sox, Mariners Decide Series
It all comes down to a rubber match in Seattle on Wednesday afternoon, and it will feature a premier pitching duel. The visiting Boston Red Sox will send their ace, Garrett Crochet, to the mound to face the Seattle Mariners and their top arm, Luis Castillo, with a key series win on the line.
Seattle’s Battery Powers a Big Bounce Back
The Mariners evened the series with a dominant 8-0 victory on Tuesday, thanks to their star battery. Catcher Cal Raleigh broke out of a slump in a big way, hitting a grand slam to take over the major league lead with 27 home runs. He also added a two-run double.
“It’s great, but you know, just trying to keep the head down,” a humble Raleigh said. “The minute you look up… that’s when the game will come around and put you in your place.”
He was catching for Bryan Woo, who was equally brilliant, tossing seven scoreless innings of one-hit ball.
The New-Look Red Sox Keep Rolling
Even after the shocking trade of superstar Rafael Devers, the Red Sox are playing great baseball, having won six of their last seven games. The team is relying on pitching and defense and isn’t letting the off-field drama become a distraction.
“We won (Monday), and (Tuesday) was just one of those days where you run into a great pitcher,” said left fielder Jarren Duran. “We’re just focused on the team we have now, and we’re going to keep rolling.” How a team responds to a major trade is a fascinating topic in our expert betting guide.
A Duel of Aces
Wednesday’s pitching matchup is a must-see. The Red Sox will start lefty Garrett Crochet (6-4, 2.24 ERA), who has been lights-out recently, coming off 8 1/3 innings of one-run ball against the Yankees. He’ll face Luis Castillo (4-4, 3.29 ERA), who has been a hard-luck pitcher lately, posting a 3.52 ERA over his last four starts with nothing to show for it. This ace-vs-ace duel will be the main event on the scores and odds board.
As these two contending MLB teams battle for the series win, the game will likely be decided by which ace shines brightest. To see who our experts think will win, check out our daily MLB picks.
