Chicago Cubs vs Seattle Mariners Picks and Predictions June 20th 2025

Chicago Cubs vs Seattle Mariners June 20th 2025

The Seattle Mariners travel to Wrigley Field to face the Chicago Cubs on Friday, June 20, 2025. The game is set to begin at 2:20 PM and will be broadcast on RSNW. Fans can expect a warm afternoon with overcast clouds and a light breeze.

The Mariners, managed by Dan Wilson, have a 37-36 record this season. They hold a 5-game deficit in the AL West. On the other side, the Cubs, led by Craig Counsell, boast a 45-29 record. The Cubs have a strong home record of 24-13. George Kirby will start for the Mariners, while Matthew Boyd takes the mound for the Cubs.

Mariners vs Cubs Key Information

• Sport: Baseball
• Teams: Seattle Mariners vs. Chicago Cubs
• Venue: Wrigley Field in Chicago, IL
• Date: Friday, June 20, 2025
• Betting Odds: Cubs MoneyLine -129, Mariners MoneyLine +109

The Mariners Can Win If…

The Seattle Mariners are coming off a close 1-3 loss against the Boston Red Sox. In that game, pitcher Luis Castillo delivered a solid performance, pitching six innings with five strikeouts. Despite the loss, the Mariners’ lineup showed potential with six hits, including doubles from Randy Arozarena and Cal Raleigh.

Cal Raleigh stands out with his impressive stats, leading the team with 27 home runs and 60 RBIs. The Mariners rank 8th in home runs this season with 91, which shows their power potential. Their on-base percentage is 9th in the league, demonstrating their ability to get runners on base.

On the pitching side, George Kirby will start for the Mariners. Although his ERA is 5.96, he has shown the ability to strike out batters, as seen in his recent outings. With a strong lineup and the potential for power hitting, the Mariners have the tools to come out on top in their next game.

The Cubs Can Win If…

The Chicago Cubs are coming off a close 7-8 loss to the Milwaukee Brewers. Despite the loss, the Cubs showed power with three home runs. Dansby Swanson, Pete Crow-Armstrong, and Ian Happ each contributed a homer, highlighting their ability to score runs quickly.

The Cubs have solid team stats that can help them win. They rank 4th in slugging percentage at .437 and 5th in home runs with 102. Their ability to hit for power gives them a strong chance to put runs on the board against the Mariners.

Matthew Boyd will be on the mound for the Cubs, bringing a 2.79 ERA and a 6-3 record. His consistency has been key for the team, and he can limit the Mariners’ offense. With a strong lineup and Boyd’s pitching, the Cubs have a good chance to secure a win.

The Lean

The Cubs are favored with a moneyline of -129 against the Mariners at +109. The Cubs have a stronger hitting lineup, ranking 6th in batting average and 4th in slugging percentage. The model projects the Cubs to win with a score of 5-4. Based on these factors, the recommendation is to pick the Cubs to win straight up.

The current over/under line is set at 9.5. The model projects a total score of 9 runs for the game. Both teams have solid pitching, with ERAs ranked in the top half of the league. Given the projected score and the pitching strengths, the recommendation is to take the under at 9.5.

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Mariners Open 10-Game Trip vs. NL Central-Leading Cubs

The Seattle Mariners are set to begin a critical 10-game road swing on Friday, kicking things off with a three-game interleague series against the Chicago Cubs, the current leaders of the National League Central.

This road trip will test Seattle, with visits to the Minnesota Twins and Texas Rangers to follow — all part of a grueling stretch of 17 games in 17 days. The Mariners are coming off a home series loss to the Boston Red Sox and will aim to rebound in Friday’s matinee at Wrigley Field.

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Kirby vs. Boyd: Friday’s Pitching Matchup

George Kirby (1-3, 5.96 ERA) takes the ball for Seattle in the opener, facing the Cubs for the first time in his career. Kirby has steadied himself of late, allowing two runs in each of his last three starts after a pair of rough outings in May.

He’ll be opposed by veteran lefty Matthew Boyd (6-3, 2.79 ERA), who has been sharp, posting a 3-1 record with a 2.80 ERA over his last six starts. Boyd is 2-2 with a 4.78 ERA in seven career outings against the Mariners but struggled in his last appearance versus Seattle, allowing five earned runs in 1 1/3 innings last season while with Detroit.

Raleigh Making History

Seattle’s Cal Raleigh continues to impress at the plate. The slugging catcher now has 27 home runs in his first 71 games — the second-highest total by a primary catcher before the All-Star break, just one shy of tying Johnny Bench.

“It’s great,” Raleigh said. “But you know, just trying to keep the head down. The minute you look up and try to admire (it all), that’s when the game will come around and put you in your place.”

Raleigh also broke Seattle’s franchise record for steals by a catcher, passing Dan Wilson with his eighth swipe of the season.

“What can you say about Cal?” Wilson said. “It’s been unbelievable and he’s been unbelievable.”

Cubs Keep Powering Up

Chicago is coming off an 8-7 loss to Milwaukee on Thursday but continues to swing the bats well. Pete Crow-Armstrong, Dansby Swanson, and Ian Happ all homered in Thursday’s contest.

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Crow-Armstrong made history with his 20th home run of the season, becoming the first player in Cubs history to notch 20 homers and 20 steals before the All-Star break — and doing so in just 73 games.

“It’s an honor,” Crow-Armstrong said. “Just an honor to be able to do that.”

Manager Craig Counsell added: “Let’s keep it going — he’s having a great season. Those are nice round numbers. Let’s make them crooked again.”