The Seattle Mariners travel to loanDepot park in Miami to face the Marlins on Wednesday, July 8, 2026, with first pitch set for 6:40 PM ET. George Kirby takes the mound for Seattle against Marlins right-hander Tyler Phillips in what shapes up as a classic pitching-versus-youth matchup. The Mariners roll out a recognizable lineup built around Cal Raleigh, Randy Arozarena, and Josh Naylor, with an eye toward building momentum as the second half of the season gets underway. Catch the action on Mariners.TV or Seattle Sports 710 AM.

Mariners at Marlins: Wednesday, July 8, 2026 Pitching Matchup

Kirby is the undisputed engine of this Seattle rotation. The right-hander's calling card has always been his elite command — historically among the best in the American League in walk rate — and that profile travels well to any ballpark. loanDepot park's humidor and spacious outfield dimensions play right into the hands of a pitcher who generates weak contact and limits free passes. If Kirby is locked in, this game could be over early.

Tyler Phillips counters for Miami. The 27-year-old left-hander has shown flashes of durability and the ability to keep the ball in the park, which will matter against a Mariners lineup that can grind through at-bats. Seattle hitters will need to be patient against Phillips and work pitch counts rather than swinging early and putting weak contact in play.

Seattle Mariners Starting Lineup at Miami

• J.P. Crawford — 3B
• Randy Arozarena — LF
• Dominic Canzone — DH
• Cal Raleigh — C
• Josh Naylor — 1B
• Luke Raley — RF
• Cole Young — 2B
• Victor Robles — CF
• Colt Emerson — SS

Three Keys for Seattle on Wednesday

• Kirby sets the tone early. If he can get through Miami's young lineup with efficiency in the first three innings, this becomes a completely different game. A quick start limits bullpen stress in a road environment.
• Raleigh and Naylor do damage against a left-hander. Both are capable right-handed hitters who can punish mistake pitches. Phillips will need to be precise or Seattle's middle of the order will make him pay.
• Crawford gets on base at the top. J.P. Crawford leading off at third base is an interesting configuration. His on-base ability at the top of the lineup can set the table for Arozarena and Canzone to drive in runs early.

Mariners vs. Marlins Prediction

This one hinges almost entirely on Kirby's performance. When he's right, he's the kind of starter who can steal a road game with minimal run support. Miami's lineup — led by Xavier Edwards, Kyle Stowers, and a young core — is talented but unproven against elite command pitching. Expect a tight, low-scoring game that stays close into the sixth or seventh inning. Advantage Seattle if Kirby throws strikes and the bullpen holds. Mariners 4, Marlins 2.