The San Francisco Giants face the Seattle Mariners in this MLB Cactus League Spring Training matchup on Saturday in Arizona.

How to Watch Giants vs MarinersWhen: Saturday, February 21, 2026Time: 3:10 PM ETTV Channel: MLB.TVLive Stream: Fubo (try for free)

Spring Training is officially underway as teams prepare for the 2026 MLB regular season. While the home runs and strikeouts do not show up on the back of a baseball card, Spring Training play is essential for veteran players to get live reps against other top-tier talent, and it also provides an opportunity for younger prospects to show off their skills while journeymen attempt to crack the Opening Day roster for new teams.

The San Francisco Giants finished the 2025 season with an 81–81 record, placing 3rd in the National League West. They enter the 2026 season led by Rafael Devers and Matt Chapman, two veteran hitters with pop.

The Seattle Mariners finished the 2025 season with a 90–72 record, placing 1st in the American League West. They head into 2026 led by Julio Rodríguez, the superstar outfielder and franchise cornerstone, and Cal Raleigh, one of baseball’s top catching bats.

This is a great Spring Training matchup that you will not want to miss; make sure to tune in and catch all the action.

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