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MLB · Final

Cubs Dominate Mariners in 7-1 Victory

Saturday, March 21, 2026, 9:10 PM ET · Peoria Stadium

Chicago Cubs 7, 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 Chicago Cubs vs Seattle Mariners?

Chicago Cubs beat Seattle Mariners 7-1 at Peoria Stadium on March 21, 2026.

In a decisive matchup at Peoria Stadium, the Chicago Cubs defeated the Seattle Mariners with a final score of 7-1, completing a two-game series sweep. This victory showcases the Cubs' strong performance, particularly as they have now won their last four games, while the Mariners have struggled, losing their last two.

The Mariners entered the game with a home record of 10-18-1 and had a recent form of 7-3 over their last ten games, but they were on a two-game losing streak. Their average runs scored in this stretch was 5.4, while they allowed an average of 3.0 runs per game. In contrast, the Cubs, with an away record of 12-16, had a more balanced recent form of 5-5 in their last ten games, with a scoring average of 5.3 and an average of 3.5 runs allowed.

In terms of home and away performance, the Mariners had a home record of 3-2 in their last five games, while the Cubs had a less favorable away record of 1-4 in the same span. The Cubs' recent success has been marked by their ability to score heavily, as evidenced by their average of 7.6 runs in their last five games.

The teams' previous meetings this season had seen the Mariners winning two out of three games against the Cubs, with notable scores of 14-6 and 10-7 in favor of the Mariners in earlier encounters. However, this latest game highlighted a shift in momentum.

Injury issues also played a role in the Mariners' performance, as they were missing several key players. Brendan Donovan was on the 7-Day IL due to a concussion, while Cole Wilcox was on the 15-Day IL with an oblique injury. Additionally, Matt Brash and Will Wilson were on the 60-Day IL, and Emerson Hancock was on the 15-Day IL with a groin issue. The Cubs were also dealing with injuries, including Edward Cabrera on the 15-Day IL due to a finger issue and Shelby Miller on the 60-Day IL with an elbow injury. Jacob Webb and Pedro Ramirez were listed as day-to-day, while Gavin Hollowell was on the 15-Day IL with a shoulder injury.

The scoring in the game began in the first inning when Amaya singled to left, bringing Ballesteros home for the Cubs' first run. The Mariners quickly answered in the second inning when Naylor scored due to a pickoff error by Mariners second baseman O. Miller, leveling the game at 1-1. However, the Cubs regained control in the sixth inning when Carlson hit a home run to left center, marking a turning point in the game.

The Cubs continued to build on their lead in the sixth inning when Cowles singled, bringing Long and O. Miller home, making it 4-1. The eighth inning saw more scoring from the Cubs, with Cowles driving in another run and Halbach contributing with a single that scored two more runs, solidifying the Cubs' dominance.

The final score of 7-1 reflected the Cubs' offensive prowess and the Mariners' struggles, particularly in the field. The Mariners' home win probability was reported at 0.0, indicating a complete lack of confidence from the betting market regarding their chances in this game, with odds reflecting the Cubs' strong form.

Overall, the game was a testament to the Cubs’ recent resurgence and the Mariners’ ongoing challenges, particularly with injuries impacting their roster. As the season progresses, both teams will look to address their respective issues and build momentum.

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
  • Edward Cabrera15-Day-ILFingerChicago Cubs
  • Shelby Miller60-Day-ILElbowChicago Cubs
  • Jacob WebbDay-To-DayArmChicago Cubs
  • Pedro RamirezDay-To-DayBackChicago Cubs
  • Gavin Hollowell15-Day-ILShoulderChicago Cubs

Recent form

Seattle Mariners

Last 10: 7-3Streak L25.4 scored · 3 allowed per game3-2 at home

  • L3-5vs Los Angeles DodgersSep 28
  • L2-3vs Los Angeles DodgersSep 27
  • W6-2vs Colorado RockiesSep 26
  • W9-2vs Colorado RockiesSep 25
  • W4-3vs Colorado RockiesSep 24
  • W7-3at Houston AstrosSep 21
  • W4-0at Houston AstrosSep 20
  • W2-0at Kansas City RoyalsSep 18
  • L5-7at Kansas City RoyalsSep 17
  • W12-5at Kansas City RoyalsSep 16

Chicago Cubs

Last 10: 5-5Streak W45.3 scored · 3.5 allowed per game1-4 away

  • W2-0vs St. Louis CardinalsSep 28
  • W7-3vs St. Louis CardinalsSep 27
  • W12-1vs St. Louis CardinalsSep 26
  • W10-3vs New York MetsSep 25
  • L7-9vs New York MetsSep 23
  • L0-1at Cincinnati RedsSep 21
  • L3-6at Cincinnati RedsSep 20
  • L4-7at Cincinnati RedsSep 19
  • L0-1at Cincinnati RedsSep 18
  • W8-4at Pittsburgh PiratesSep 17

Standings

TeamGames behindLostStreakWin %Won
Milwaukee-53W2.62187
Chicago962L2.55778
St. Louis1770W2.50070
Pittsburgh1972L1.48668
Cincinnati2073W2.47967
Houston-69W1.50771
Texas271L1.49369
Seattle574W2.47166
Athletics1786W1.38654
Los Angeles1887L2.37953

How the scoring went

  1. 1st Inning1-0Amaya singled to left, Ballesteros scored.
  2. 2nd Inning1-1Naylor scored on pickoff error by second baseman O. Miller.
  3. 2nd Inning1-1Naylor scored on pickoff error by second baseman O. Miller.
  4. 2nd Inning1-1Naylor scored on pickoff error by second baseman O. Miller.
  5. 6th Inning2-1Carlson homered to left center (404 feet).
  6. 6th Inning4-1Cowles singled to left, Long scored and O. Miller scored.
  7. 8th Inning5-1Cowles singled to right, Le. Espinoza scored, O. Miller to second, Long to third.
  8. 8th Inning7-1Halbach singled to right, Long scored and O. Miller scored, Cowles to second.

Win probability

Above the line favours Seattle Mariners, below favours Chicago Cubs.

Venue

  • Peoria StadiumPeoria, Arizona
  • Attendance11029
  • OfficialsNestor Ceja, Brock Ballou, Bryan Van Vranken, Louie Krupa

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