How to watch to today’s Philadelphia Phillies vs Seattle Mariners MLB game: Live stream, regional networks, team news, start time

Trea Turner and Josh Naylor will be front and center on Monday night when the Philadelphia Phillies welcome the Seattle Mariners to Citizens Bank Park.

Seattle limps into this series after dropping three of its last four, including a tough loss to the Mets on Saturday that put a dent in their momentum. The Mariners entered Sunday sitting at 68-56, good for second place in the AL West, trailing the Astros by just a game and a half in a race that seems destined to go down to the wire.

Philadelphia, on the other hand, wrapped up its weekend with a fireworks show in Washington, outslugging the Nationals to salvage a split in their four-game set. The Phillies hit the new week at 71-53, enjoying a comfortable 5.5-game cushion over the Mets in the NL East.

Here, GOAL brings you everything you need to know about how to watch Philadelphia Phillies vs Seattle Mariners MLB game, plus plenty more.

How to watch Philadelphia Phillies vs Seattle Mariners on TV & stream live online

• National TV channel: MLB Network
• Local TV channel: NBCS-PH, ROOT Sports NW
• Streaming service: Fubo

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To watch the entire MLB season, Fubo and DirecTV Stream are the two best streaming services for baseball fans. Both carry MLB.tv for out-of-market access to games and you can also check out our table below for information on regional sports networks and where to find them.

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Philadelphia Phillies vs Seattle Mariners: Date and First-Pitch time

Philadelphia Phillies will take on Seattle Mariners in a highly anticipated MLB game on Monday, August 18, 2025, at 6:40 pm ET/ 3:40 am PT at Citizens Bank Park in Philadelphia, Pennsylvania.

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Philadelphia Phillies vs Seattle Mariners team news

Philadelphia Phillies team news

The Phillies counter with Ranger Suárez, who has been steady all year. The lefty enters his 19th start with an 8-6 mark, 3.28 ERA, and 101 strikeouts in 112.1 innings.

Power is the name of the game in Philly’s lineup. Kyle Schwarber has already launched 43 homers and driven in 102 runs, ranking near the very top of MLB in both categories. Turner (.291) brings balance with his contact skills, while Bryce Harper (19 HR, 28 doubles) and Nick Castellanos (16 HR, .253 AVG) add plenty of firepower to a dangerous middle of the order.

Seattle Mariners team news

For Seattle, Cal Raleigh continues to be the engine of their offense, swinging one of the most powerful bats in baseball. He leads not only his team but the entire league with 47 home runs and 102 RBI on the year. Raleigh brings a three-game hitting streak into Philly and has been scorching lately, batting .438 with a pair of doubles, two long balls, and four RBI across his last five outings.

Josh Naylor has been the Phillies’ model of consistency, pacing the club with a .286 average, while Julio Rodríguez (.259, 24 homers) and Eugenio Suárez (.235, 38 homers) provide punch for the Mariners. Suárez is also riding a hot streak, notching hits in five straight games.

On the mound, Logan Gilbert gets the nod for Seattle, making his 18th start of the season. The right-hander comes in with a 3-4 record, 3.31 ERA, and 124 strikeouts in 89.2 innings. He was sharp his last time out against Baltimore but didn’t factor into the decision.

Philadelphia Phillies vs Seattle Mariners projected starting pitchers

Philadelphia Phillies vs Seattle Mariners head-to-head record 

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