Jun 17, 2025; Seattle, Washington, USA; Seattle Mariners catcher Cal Raleigh (29) hits a grand-slam home run against the Boston Red Sox during the second inning at T-Mobile Park. Mandatory Credit: Joe Nicholson-Imagn Images

Chicago Cubs vs Seattle Mariners Prediction 06/20/2025 Picks

Pick details

Seattle (37-36) vs Chicago (45-29)

June 20, 2025 at 02:20 PM EDT

The Line: Betting Odds: Chicago -130 — Over/Under: +9.5

(Get latest betting odds)

The Seattle Mariners and the Chicago Cubs meet Friday in MLB action from Wrigley Field. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Seattle Mariners vs. Chicago Cubs prediction.

Starting Pitching Matchup

The Seattle Mariners will trot out George Kirby for the start here and Kirby is 1-3 with a 5.96 ERA and 30 strikeouts this season. This will be Kirby’s first career start against the Cubs. Matthew Boyd will get the start for the Cubs here and is 6-3 with a 2.79 ERA and 73 strikeouts this season. In his last five starts against the Mariners, Boyd is 1-2 with a 5.04 ERA and 27 strikeouts.

Seattle Mariners Recap

The Seattle Mariners come into this game looking to rebound from a 3-1 loss at the hands of the Boston Red Sox last time out to sit at 37-36 on the year. After this series, the Mariners will head on the road for a series against the Minnesota Twins.

Mariners Drop Series Rubber Match Vs. Boston

Jorge Polanco has 52 hits including 11 home runs and 36 RBIs while Cal Raleigh has 71 hits with 14 doubles, a team-high 27 home runs and 60 RBIs. Randy Arozarena has 58 hits with 15 doubles, 8 home runs, 28 RBIs and 14 stolen bases. Julio Rodriguez also has 75 hits with 3 triples, 10 home runs, 34 RBIs and 12 stolen bases. Dylan Moore has 8 homers and 9 stolen bases as well this season. Rowdy Tellez has also added 11 home runs and 27 RBIs while J.P Crawford has 72 hits with 10 doubles, 6 home runs and 29 RBIs.

Why the Seattle Mariners will win

The Mariners have won each of their last three games as underdogs against National League opponents following a home loss.
The Cubs have lost five of their last six day games against teams that held a winning record.
The Mariners have covered the run line in 10 of their last 11 games as underdogs following a home loss.
The Cubs have failed to cover the run line in each of their last five games after playing the previous day.

Seattle Mariners Player Prop Facts

Cal Raleigh has hit at least one home run in four of the Mariners’ last five games against NL opponents that held a winning record.
George Kirby has recorded a win in six of his last seven road appearances.
George Kirby has recorded six or more strikeouts in three of his last four appearances with the Mariners as underdogs against NL opponents.
Cal Raleigh has recorded at least one RBI in each of the Mariners’ last five games against NL opponents that held a winning record.
Victor Robles has scored at least one run in each of his last five appearances in day games against teams that held a winning record.
Victor Robles has recorded at least one hit in each of his last 10 appearances in day games.
Cal Raleigh ranks 1st in the league in Home Runs (27) this season.

Chicago Cubs Recap

The Chicago Cubs come into this game looking to rebound from their 8-7 loss at the hands of the Milwaukee Brewers in Thursday’s series finale to sit at 45-29 on the year. After this series, the Cubs will head on the road for a division series against the St. Louis Cardinals.

Cubs Have Three-Game Win Streak Snapped

Ian Happ has 65 hits with 14 doubles, 8 home runs and 33 RBIs. Kyle Tucker has 76 hits including 15 doubles, 4 triples, 13 home runs and 43 RBIs while Seiya Suzuki also has 72 hits with 18 doubles and 18 home runs and 61 RBIs of his own. Miguel Amaya’s added 9 doubles and 25 RBIs and Pete Crow-Armstrong also has contributed 77 hits, 16 doubles, 3 triples, 20 home runs and 60 RBIs as well this season. Dansby Swanson has added 14 home runs and 39 RBIs, while also having the unfortunate distinction of leading the Cubs with 84 strikeouts so far this season. Crow-Armstrong also has a team-high 23 stolen bases while Nico Hoerner has 14 stolen bases this season. Tucker’s also added 18 stolen bases while Michael Busch has also chipped in 13 doubles, 3 triples, 11 home runs and 39 RBIs this season.

Why the Chicago Cubs will win

The Cubs have won each of their last 10 games as favorites following a loss.
The Mariners have lost seven of their last eight road games.
The Mariners have failed to cover the run line in each of their last eight road games.
The Cubs have covered the run line in each of their last nine Friday games as favorites against AL West opponents.

Chicago Cubs Player Prop Facts

Ian Happ has hit at least one home run in three of the Cubs’ last five games against opponents that held a winning record.
Matthew Boyd has recorded a win in each of his last six home appearances.
Seiya Suzuki has recorded at least one RBI in each of the Cubs’ last seven games against AL West opponents.
Seiya Suzuki has scored at least one run in each of the Cubs’ last six games against AL West opponents.
Matthew Boyd has recorded six or more strikeouts in seven of his last eight Friday appearances against teams that held a winning record.
Seiya Suzuki has recorded at least one hit in each of the Cubs’ last nine games against AL West opponents.
Pete Crow-Armstrong ranks 3rd in the league in Steals (23) this season.

Total Runs Facts

Each of the Cubs’ last seven games against AL West opponents have gone OVER the total runs line.
Each of the Mariners’ last four day games against NL Central opponents have gone OVER the total runs line.

Seattle Mariners vs. Chicago Cubs Prediction

I’m looking at the under here. George Kirby has started to string some decent starts together after a bit of a slow start to the year and the Cubs haven’t necessarily been lighting the world on fire offensively as of late, scoring 3 runs or less more often than not right now. On the other side, the Mariners offense continues to be inconsistent and they’ve had more than their fair share of issues against lefties and I think the Mariners struggle here too. This feels like a 4-3 kind of game so give me the under here.

Chris Ruffolo's Pick: Under 9.5

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