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How to Watch Guardians vs. Mariners: Sunday Night Baseball on Peacock (March 29)

Sunday Night Baseball is live on Peacock this week with one of MLB's biggest games.

By Trent Moore
Cal Raleigh and Miles Mastrobuoni of the Seattle Mariners on a baseball feild.

Cal Raleigh and Miles Mastrobuoni of the Seattle Mariners celebrate Raleigh’s home run during the third inning of the spring training game against the Chicago White Sox at Peoria Stadium on February 24, 2026 in Peoria, Arizona. 

 Photo: Getty Images

Sunday night is for baseball this spring, and Peacock is your home for some of the biggest games this season. First up for the inaugural Sunday Night Baseball game this year? It’s the Cleveland Guardians taking on the Seattle Mariners, live from Seattle — and live on Peacock.

How to Watch

Watch MLB on NBC and streaming on Peacock.

Sunday Night Baseball will be a staple of NBC Sports’ spring lineup, joining the Sunday night primetime sports slot alongside Sunday Night Football games from the NFL and Sunday Night Basketball games from the NBA. With part of the MLB season overlapping with the end of the NBA season, Sunday Night Baseball will largely stream on Peacock for the first several weeks — before also sliding over to broadcast and taking over the NBC slot once the NBA season wraps.

RELATED: Watch the Biggest MLB Games Live All Season on Peacock Right Here

NBC Sports will have two marquee MLB games each week, starting off the day with MLB Sunday Leadoff in the morning, then the primetime Sunday Night Baseball game at night.

Juan Benjamin of the Cleveland Guardians is seen on the field during the game between the Texas Rangers.

Juan Benjamin, #0, of the Cleveland Guardians is seen on the field during the game between the Texas Rangers and the Cleveland Guardians at Goodyear Ballpark on Wednesday, February 25, 2026 in Goodyear, Arizona. 

 Photo: Zach Gardner/MLB Photos/Getty Images

How to Watch Cleveland Guardians vs. Seattle Mariners?

NBC Sports’ first installment of Sunday Night Baseball gets underway on Sunday, March 29 with Cleveland Guardians vs. Seattle Mariners. The game will stream live on Peacock, with first pitch scheduled for 7 p.m. ET.

The game will feature two of last year's best teams, looking to build on last season’s success, as seven-time All-Star Jose Ramirez and the Guardians take on 2025 home run leader Cal Raleigh and the Mariners. Both teams won American League division titles last season, and are hoping to repeat this year — and both squads have their sights set on a postseason run this year.

RELATED: MLB on NBC: Sunday Night Baseball & Sunday Leadoff Broadcast Team, Explained

Broadcasters in the booth for Guardians vs. Mariners on Peacock

This week’s Sunday Night Baseball announcers include play-by-play voice Jason Benetti and analysts Rick Manning and Ryan Rowland-Smith. Manning has served as an MLB analyst for Cleveland since 1990, making him the longest tenured commentator in team history. Ahmed Fareed will host the Guardians-Mariners pregame show.

MLB Games on NBC & Peacock This Season

The MLB is back on NBC and Peacock this season with the addition of Sunday Night Baseball in primetime and plenty of Peacock-exclusive games on the slate this season. Find the full schedule right here. Peacock will also stream games of the day throughout the season during the week, so be sure to check in weekly for that specific schedule week-to-week.

The full slate features plenty of storied rivalries from across the league. Sunday Night Baseball will be home to division rivalry games including Diamondbacks-Dodgers (March 26); Braves-Phillies (April 19); Tigers-Royals (May 10); Rangers-Angels (May 24); Cubs-Cardinals (May 31); Mets-Phillies (June 21); Yankees-Red Sox (June 28); Padres-Dodgers (July 5); Mariners-Astros (August 16); and Padres-Giants (Sept. 13). Catch it all on Peacock right here.

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