The Seattle Mariners host the Chicago Cubs on Saturday, August 22, 2026, at T-Mobile Park, with first pitch set for 7:15 PM ET. Seattle sends right-hander Kade Anderson to the mound against Cubs left-hander David Peterson in what shapes up as a compelling interleague matchup. The game airs nationally on FOX and FOX ONE, with local radio coverage on 104.3 The Score and Seattle Sports 710 AM. With the regular season in full swing, every game in this stretch carries real weight in the standings race.

Starting Pitching: Kade Anderson vs. David Peterson

Kade Anderson gets the ball for Seattle. The young starter has been one of the more intriguing arms in the Mariners rotation, and tonight he draws a Chicago lineup that will test his ability to work through a deep order. Anderson will need to attack the strike zone early and keep the Cubs from stringing together walks and hard contact — the recipe that unravels any starter at T-Mobile Park.

David Peterson makes the trip to Seattle for the Cubs. A veteran left-hander with experience working in big markets, Peterson will look to exploit any holes in a Mariners lineup that is built around a core of legitimate run producers. The Mariners offense will need to stay disciplined against Peterson's mix and avoid chasing early in counts.

Seattle Mariners Starting Lineup

• 1. Brendan Donovan — 3B
• 2. Randy Arozarena — LF
• 3. Dominic Canzone — RF
• 4. Julio Rodríguez — CF
• 5. Josh Naylor — 1B
• 6. Taylor Ward — DH
• 7. Cal Raleigh — C
• 8. Cole Young — 2B
• 9. Leo Rivas — SS

Keys to Watch for Seattle

Julio Rodríguez in the Cleanup Spot

J-Rod batting fourth puts the most dynamic player on this roster in a position to do real damage with runners on base. If Donovan, Arozarena, and Canzone can get on base ahead of him, Rodríguez gives Seattle a legitimate middle-of-the-order threat that any pitcher has to respect.

Cal Raleigh and the Bottom of the Order

Raleigh batting seventh might look quiet on a lineup card, but his ability to punish a mistake pitch means the Cubs cannot simply coast through the bottom third of Seattle's order. Cole Young at eight and Leo Rivas at nine give the Mariners athletes who can create havoc at the top of the next inning.

Anderson's Command and Pitch Efficiency

The Mariners' best path to a win runs through Anderson giving them length. If he can stay out of deep counts, work his way through six innings, and hand the ball to the Seattle bullpen with a lead, this is a winnable game at home.

Prediction

T-Mobile Park gives Seattle a real advantage, and the Mariners lineup — with Rodríguez anchoring it — has the firepower to put runs on the board against a left-hander. Expect this to be a tight, low-scoring game decided in the sixth or seventh inning. Mariners win, 4-2.