Mariners vs Orioles: Live Stream, Start Time, Pitching Matchups & Score Updates for Tonight’s AL Showdown

BALTIMORE — A scorching August heat wave isn’t the only thing raising temperatures at Oriole Park at Camden Yards tonight. The red-hot Seattle Mariners (66-53) bring a season-best seven-game winning streak east to face the Baltimore Orioles (53-65) in the opener of a three-game set that could reshape both division races. First pitch is scheduled for 6:35 p.m. ET, with All-Star right-hander George Kirby (7-5, 4.04 ERA) opposing Baltimore’s Dean Kremer (8-8, 4.35 ERA) in a duel of hard-throwing strike-throwers. Kirby has quietly anchored Seattle’s rotation, posting a 1.13 WHIP and allowing only 9 homers in 78 innings, while Kremer counters with a career-best 1.28 WHIP and 132 ⅓ innings of work. Key story lines to watch • Division pressure cooker: Seattle sits one game behind Houston in the AL West and can vault into first place with a strong road trip. Baltimore, 15½ back in the AL East, is playing spoiler but also jockeying for future roster spots after dropping two straight to Oakland over the weekend. • Cal Raleigh’s power surge: The switch-hitting catcher leads MLB with 45 homers and 98 RBI; he’s slugging .586 since the All-Star break and has homered in five of his last seven games. Camden Yards’ inviting right-field porch could add to that tally. • Gunnar Henderson’s breakthrough: Baltimore’s 23-year-old shortstop paces the club with 14 HR and a .284 /.353 /.466 slash line. Henderson has a .925 OPS at home this year and is 5-for-12 lifetime off Kirby. • Injury updates: Seattle remains without right-fielder Luke Raley (10-day IL) and rookie starter Bryce Miller (15-day IL), while Baltimore is missing outfield prospect Colton Cowser (7-day IL, concussion) and reliever Colin Selby (15-day IL). Season series recap Baltimore swept a rain-shortened three-game series in Seattle from June 3-5, taking each game by one run. The Orioles hold a 3-0 edge, outscoring the Mariners 12-6 despite being the underdog in every matchup. Betting lines and weather Seattle opened at –180 on the money line but has settled around –155, with the total hovering at 9.5 runs. Oddsmakers give the Mariners a 53.8 percent win probability, according to ESPN Analytics. Game-time temperatures are expected to linger in the mid-90s, favoring hitters as the ball carries in humid air. Why this series matters • Wild-card chessboard: The Mariners currently occupy the second AL wild-card slot and can gain ground on division rivals while the Astros tangle with the red-hot Blue Jays. • Showcase for young arms: Kirby and Kremer are two of only six MLB starters with 120-plus innings and fewer than 30 walks this season, underscoring a premium matchup of command vs. aggression. • Postseason preview? Seattle’s pitching-heavy blueprint mirrors last year’s Orioles team that rode run prevention to an AL East crown. This series offers a litmus test of whether Baltimore’s next wave (Henderson, Cowser, Jackson Holliday) is ready to contend again in 2026. How to watch and stream Television coverage is on ROOT Sports NW in Seattle and MASN in the Mid-Atlantic region, with nationwide streaming on MLB.TV (blackout restrictions apply). Radio calls are on Seattle Sports 710 AM and 98 Rock FM in Baltimore. Projected lineups Mariners: Arozarena LF, Raleigh C, Rodríguez CF, Naylor 1B, Suárez 3B, Polanco DH, Canzone RF, Crawford SS, Young 2B Orioles: Mullins CF, Henderson SS, Santander RF, Mountcastle 1B, O’Hearn DH, Westburg 3B, Hays LF, Holliday 2B, McCann C Bottom line Seattle’s momentum plus Kirby’s elite command make the Mariners favorites, but Baltimore’s familiarity with Kirby’s arsenal and Camden Yards’ hitter-friendly dimensions set the stage for another tight finish. Expect fireworks in the late innings—and perhaps a statement win that reverberates across the playoff picture.