Seattle Mariners vs. Tampa Bay Rays Picks and Prediction, Monday, September 1, 2025
Seattle (72-64) will be trying to take the series lead when they visit George M. Steinbrenner Field on Monday night to face Tampa Bay (66-69) in the first game of their three-game series at 7:35 PM. ET. Read on to find out which team picks up the win in this Mariners vs. Rays prediction.
Luis Castillo, 8-7, 3.75 ERA, will get the start for the Mariners. The Rays will counter with Shane Baz, 8-11, 5.19 ERA.
Seattle is 6-4 in its last 10 games against Tampa Bay.
**This preview was written before Sunday's games were played.**
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Seattle Trying To Bounce Back From Series Loss
The Mariners had won two straight series before dropping their series against Cleveland over the weekend. They are second in the AL West standings, three games behind Houston, and will try to make up some ground with a win on Monday.
Seattle averages 4.58 runs per game. which is 11th in the league. Their .241 batting average is 21st in the league. Their .317 on base percentage is 15th, while their .411 slugging percentage is 11th.
Julio Rodriguez leads Seattle with a .264 batting average, while Cal Raleigh leads the team with 50 home runs and 107 RBI.
Seattle is giving up 4.41 runs per game, which is 18th in the league. Opponents have a .244 batting average against the Mariners, which is 17th in the league. Their 3.98 ERA is also 17th, while their 1.26 WHIP is 12th.
In his last start, Castillo gave up five hits and five runs in five innings, leading to a 7-6 loss to San Diego. He is 2-1 with a 3.16 ERA in six games against Tampa Bay.
Tampa Bay Going For Second Consecutive Series Win
The Rays bounced back from their series loss to Cleveland with a series win against Washington over the weekend. They will try to keep the momentum going and pick up their second series win in their last three when they face the Mariners.
Tampa Bay averages 4.47 runs per game, which is 13th in the league. Their .250 batting average is 13th in the league. Their .313 on base percentage is 19th, while their .401 slugging percentage is 15th.
Yandy Diaz leads Tampa Bay with a .284 batting average, while Junior Caminero leads the team with 39 home runs and 94 RBI.
Tampa Bay is giving up 4.15 runs per game, which is ninth in the league. Opponents have a .237 batting average against the Rays, which is seventh in the league. Their 3.92 ERA is 14th, while their 1.21 WHIP is fourth.
In his last start, Baz gave up three hits and three runs in six innings, leading to a 3-0 loss to Cleveland.
Seattle Mariners ML (4 Units)
The Rays have lost four of their last six home games, while the Mariners split their last six games. Seattle has the advantage here because they've hit the ball well against right-handers, and they're going up against Baz, who hasn't looked good on the mound, giving up 14 runs in his last three starts. he gave up 19 runs in his last three home starts and will have a hard time slowing down the Mariners.
Tampa Bay won't be as successful offensively because they didn't hit the ball well in recent home games, and they're going up against Castillo, who gave up 10 runs in his last three road starts. With Seattle's bullpen also playing well, they won't have trouble keeping Tampa Bay's offense in check. Take Seattle on the money line.
Over (4 Units)
The Mariners average 4.58 runs per game and average 4.91 runs per game on the road. They're batting .243 against right-handers, and they're facing a starter who gave up 19 runs in his last three home starts. The Rays average 4.47 runs per game and average 4.63 runs per game at home. They're batting .260 against right-handers, and they're facing a starter who gave up 14 runs in his last three starts. Expect these teams to score enough runs to push the score over the total. The Mariners and Rays played over the total in three of their last four meetings.
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