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The lights of T-Mobile Park shine bright this Thursday as the Cleveland Guardians visit the Seattle Mariners for a star-studded 2026 Opening Day. While the NCAA Tournament is reaching its fever pitch, the Emerald City is focused on the diamond as two defending division champions go head-to-head to start the year. Fans can catch every strikeout and home run of this national broadcast live on Sling TV.
This Opening Day encounter features two of the game’s premier young right-handers. The Mariners hand the ball to Logan Gilbert, who is looking to re-establish his workhorse status after a 2025 campaign where he posted a sharp 3.44 ERA despite a mid-season injury. Conversely, the Guardians counter with Tanner Hayes Bibee, who finally gets his Opening Day moment after being scratched from last year's opener due to illness. Bibee set a career-high with 182.1 innings in 2025 and is the cornerstone of a Cleveland staff looking to defend its AL Central crown. As Seattle debuts a lineup featuring 2025 Trade Deadline acquisition Josh Naylor (now back on a massive free-agent deal) and leadoff man Brendan Donovan, the Guardians lean on the legendary José Ramírez to spark a high-contact offense. You can witness this elite tactical duel live on Sling TV.
The 2026 Mariners enter the season with one of the most explosive lineups in baseball, anchored by Cal Raleigh, who is coming off a staggering 60-home run 2025 season. He is flanked by face-of-the-franchise Julio Rodríguez and speedster Randy Arozarena. For the Guardians, success hinges on a blend of veteran power from Rhys Hoskins and the arrival of top prospect Chase DeLauter. With two elite bullpens ready to bridge the gap to closers Andrés Muñoz and Cade Smith, this 10:10 PM ET matchup is the premier event of the late-night slate. Sling TV is your home for the full national broadcast.
How to watch Guardians vs. Mariners
Thursday's Opening Day game will be a featured late-night national broadcast, with live coverage beginning at 10:00 PM ET. The best way to catch the most MLB action throughout the 2026 season is through Sling TV, providing fans with an affordable and high-definition way to watch on any device.
| Category | Details |
| Date | Thursday, March 26, 2026 |
| First Pitch | 10:10 PM ET / 7:10 PM PT |
| Streaming Service | Sling TV |
| Venue | T-Mobile Park, Seattle, WA |
| Pitching Matchup | Tanner Bibee vs. Logan Gilbert |
Guardians vs. Mariners Betting Odds & Predictions
The Mariners enter as solid home favorites due to their offensive firepower and home-field advantage, though the Guardians have been one of the most profitable road underdogs over the last year.
| Betting Line | Mariners -1.5 |
| Over/Under | 6.5 Runs |
| Moneyline | SEA -180 | CLE +152 |
Prediction: Logan Gilbert has been untouchable at T-Mobile Park when healthy, and Cleveland's high-contact approach may struggle against his high-velocity stuff early in the year. While Bibee will keep it close, the Mariners' power advantage is too significant to ignore. Final Score: Mariners 4, Guardians 2.
Key Probable Pitchers
The spotlight is on two of the AL's best arms. For the Mariners, Logan Gilbert looks to start a Cy Young-caliber campaign. For the Guardians, Tanner Bibee officially takes the mantle as the club's ace in a venue where he has historically thrived.
| Starting Pitcher (2025 Stats) | W-L | ERA | WHIP | SO |
| Logan Gilbert (SEA) | 6-6 | 3.44 | 1.03 | 160 |
| Tanner Bibee (CLE) | 12-11 | 4.24 | 1.23 | 162 |
Individual Matchups: Stars and Playmakers
The Mariners feature a power core that redefined the franchise in 2025. Cal Raleigh became just the second catcher in history to hit 60 homers, while Julio Rodríguez remains a dual threat on the basepaths and in the box.
| Mariners Key Player (2025 Stats) | AVG | HR | RBI | OPS |
| Cal Raleigh (C) | .247 | 60 | 125 | .948 |
| Julio Rodríguez (CF) | .267 | 32 | 95 | .798 |
The Guardians are led by the ever-consistent José Ramírez, who is coming off another 30-homer season. He is joined by Kyle Manzardo, whose power development in late 2025 has him poised for a massive sophomore breakout.
| Guardians Key Player (2025 Stats) | AVG | HR | RBI | OPS |
| José Ramírez (3B) | .283 | 30 | 85 | .863 |
| Kyle Manzardo (DH) | .234 | 27 | 70 | .768 |
Stream MLB on Sling TV
Sling TV is the premier destination for baseball fans during the 2026 season. It provides a seamless way to catch national MLB broadcasts on TBS, TNT, and truTV, as well as essential regional sports networks in major markets.
Sling TV: New subscribers can check out the latest Sling Blue or Orange promotions to ensure they have access to national broadcasts. With Sling, you can watch the Guardians vs. Mariners clash and follow the road to the Fall Classic on your favorite devices.
Frequently Asked Questions: Guardians vs. Mariners Opening Day
How can I stream the Guardians vs. Mariners game?
The Opening Day matchup will be available on regional networks (Mariners.TV/CLEG) and national platforms. Fans can stream the action via Sling TV or the MLB.TV app.
Did the Mariners acquire Josh Naylor?
Yes, the Mariners acquired Josh Naylor at the 2025 Trade Deadline and recently signed him to a five-year, $92.5 million free-agent extension ahead of the 2026 season.
Where is the game being played?
The 2026 season opener is being held at T-Mobile Park in Seattle, Washington.
