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MLB · Final

Red Sox Defeat Mariners 5-1 in Seattle Showdown

Saturday, June 20, 2026, 10:10 PM ET · T-Mobile Park

Boston Red Sox 5, Seattle Mariners 1, final. Our MLB picks are sealed as a hash before kickoff and settled in public, losses included.

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Quick answers

Who won Boston Red Sox vs Seattle Mariners?

Boston Red Sox beat Seattle Mariners 5-1 at T-Mobile Park on June 20, 2026.

Who was favored in Boston Red Sox vs Seattle Mariners?

Seattle Mariners were the favorite at DraftKings, moneyline -126 (about 56% implied). The underdog won.

The Boston Red Sox secured a convincing 5-1 victory over the Seattle Mariners at T-Mobile Park, concluding the series with a 2-1 record in favor of Boston. This win was significant for the Red Sox, who have struggled on the road this season, now holding a 31-43 overall record. The Mariners, on the other hand, are at a .500 mark of 39-39, but have seen a decline in form recently.

In their last ten games, the Mariners have recorded a 4-6 record, with a current losing streak of two games. They averaged 4.1 runs scored per game while allowing 5.4 runs during this stretch. Their recent games included a loss to the Red Sox just a day prior, where they fell 2-6, and a previous loss to the Baltimore Orioles, 3-5. Their home record stands at 1-2 in their last three games.

The Red Sox, despite their overall struggles, managed to snap a losing streak with this win, improving to 3-7 in their last ten games. They averaged 3.9 runs scored and 3.9 runs allowed during this period. Their recent form included a victory over the Mariners on June 20, and they had also lost several close games against the Toronto Blue Jays prior to this matchup.

Historically, the two teams have been evenly matched, with a head-to-head record of 3-3 in their last six meetings. The Mariners had won their previous encounter in June 2025, 8-0, but the Red Sox's recent victory suggests a shift in momentum.

In terms of injuries, the Mariners were missing several key players, including Brendan Donovan, who is on the 7-Day IL due to a concussion, and Cole Wilcox, who is on the 15-Day IL with an oblique injury. Matt Brash, Will Wilson, and Emerson Hancock are also on the injured list, further complicating the Mariners' lineup. The Red Sox had their own injury concerns, with Ceddanne Rafaela and Adley Rutschman listed as day-to-day, while Johan Oviedo, Kutter Crawford, and Zack Kelly are on the 60-Day IL.

The betting market, as provided by DraftKings, had the Mariners as slight favorites at -126, with a spread of -1.5 and a total set at 7.0. The odds reflected the competitive nature of the matchup, though the Red Sox's recent form may have influenced the betting lines.

The game conditions were typical for a summer evening in Seattle, with fans treated to a competitive atmosphere. The Mariners took an early lead in the first inning when Naylor singled to center, scoring Crawford and putting Seattle up 1-0. However, the Red Sox responded with a powerful performance, highlighted by a home run from Abreu in the fourth inning, which tied the game at 1-1.

The sixth inning proved pivotal for Boston, as they capitalized on wild pitches by Mariners pitcher José A. Ferrer. Abreu scored on a wild pitch, and the Red Sox continued to build their lead with a series of infield singles that resulted in four runs during the inning, ultimately sealing the game at 5-1.

Overall, this game showcased the Red Sox's ability to bounce back after a rough stretch, while the Mariners will need to regroup and address their recent struggles as they continue their season.

Odds

BookSpreadTotalMoneyline
DraftKingsSEA -126 7 o -121 / u +100 Boston Red Sox +105 · Seattle Mariners -126

What these prices pay on $100 · What these numbers mean

Injury report

  • Brendan Donovan7-Day ILConcussionSeattle Mariners
  • Cole Wilcox15-Day-ILObliqueSeattle Mariners
  • Matt Brash60-Day-ILLatSeattle Mariners
  • Will Wilson60-Day-ILThumbSeattle Mariners
  • Emerson Hancock15-Day-ILGroinSeattle Mariners
  • Ceddanne RafaelaDay-To-DayQuadricepsBoston Red Sox
  • Adley RutschmanDay-To-DayElbowBoston Red Sox
  • Johan Oviedo60-Day-ILElbowBoston Red Sox
  • Kutter Crawford60-Day-ILForearmBoston Red Sox
  • Zack Kelly60-Day-ILElbowBoston Red Sox

Recent form

Seattle Mariners

Last 10: 4-6Streak L24.1 scored · 5.4 allowed per game1-2 at home

  • L2-6vs Boston Red SoxJun 20
  • L3-5vs Baltimore OriolesJun 18
  • W3-1vs Baltimore OriolesJun 17
  • L1-10at Washington NationalsJun 14
  • L3-8at Washington NationalsJun 13
  • W10-2at Washington NationalsJun 12
  • L5-7at Baltimore OriolesJun 11
  • L2-7at Baltimore OriolesJun 10
  • W6-5at Baltimore OriolesJun 9
  • W6-3at Baltimore OriolesJun 8

Boston Red Sox

Last 10: 3-7Streak W13.9 scored · 3.9 allowed per game1-3 away

  • W6-2at Seattle MarinersJun 20
  • L3-4vs Toronto Blue JaysJun 18
  • L0-3vs Toronto Blue JaysJun 17
  • L1-6vs Toronto Blue JaysJun 16
  • L4-6vs Texas RangersJun 14
  • W6-3vs Texas RangersJun 13
  • W10-1vs Texas RangersJun 12
  • L5-7at Tampa Bay RaysJun 10
  • L3-4at Tampa Bay RaysJun 9
  • L1-3at Tampa Bay RaysJun 8

Standings

TeamGames behindLostStreakWin %Won
Tampa Bay-56L1.59783
New York3.560W2.57180
Boston8.565L2.53675
Toronto14.571W1.49369
Baltimore14.571L2.49369
Houston-69W1.50771
Texas271L1.49369
Seattle574W2.47166
Athletics1786W1.38654
Los Angeles1887L2.37953

How the scoring went

  1. 1st Inning0-1Naylor singled to center, Crawford scored, Rodríguez to second.
  2. 4th Inning2-1Abreu homered to center (414 feet), Seigler scored.
  3. 6th Inning3-1Abreu scored on Ferrer wild pitch, Duran to second on wild pitch by Ferrer, Contreras to third on wild pitch by Ferrer.
  4. 6th Inning3-1Wild pitch by pitcher José A. Ferrer. Wilyer Abreu scores. Willson Contreras to 3rd. Jarren Duran to 2nd.
  5. 6th Inning4-1Durbin reached on infield single to shortstop, Contreras scored, Duran to third.
  6. 6th Inning5-1Mayer reached on infield single to second, Duran scored, Durbin to second.

Win probability

Above the line favours Seattle Mariners, below favours Boston Red Sox.

Venue

  • T-Mobile ParkSeattle, Washington
  • Attendance45663
  • OfficialsPaul Clemons, Adrian Johnson, Quinn Wolcott, Steven Jaschinski

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Fixture data from the league feeds. The report was written from the recorded facts for this game and nothing else.