Seattle Mariners vs Tampa Bay Rays Forecast, 9/3/2025 MLB Selections, Top Bets & Odds

Home » Seattle Mariners vs Tampa Bay Rays Forecast, 9/3/2025 MLB Selections, Top Bets & Odds

Game: Seattle Mariners vs Tampa Bay Rays

Date: Wednesday, September 3, 2025

Location: George M. Steinbrenner Field in Tampa, FL

TV: FanDuel Sports Network Sun

Odds/Point Spread: Seattle (-210) Tampa Bay (+172)

On Wednesday, the Tampa Bay Rays (68-69) will face off against the Seattle Mariners (73-65) at George M. Steinbrenner Field. The current betting odds position Seattle at -210, while Tampa Bay is at +172. The game features an over/under of 8 runs. Starting pitchers for this matchup include George Kirby and Adrian Houser.

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The Mariners have accumulated 188 doubles and have launched 196 home runs this season. With a slugging percentage of .411, Seattle has struck out 1,231 times and received 461 walks. Averaging 4.6 runs per game, they rank 12th in MLB. So far, they’ve recorded 604 RBIs and 1,134 hits, with a team batting average of .242. Their on-base percentage stands at .318, contributing to a total of 629 runs scored this year.

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The Mariners hold a strikeout-to-walk ratio of 2.87 and feature a collective WHIP of 1.25. The pitching staff has allowed 168 home runs and a total of 612 runs (ranking 18th in MLB). Seattle’s pitching has resulted in 1,150 hits allowed (8.3 per 9 innings) and 552 earned runs, giving them a season ERA of 3.99 (17th in league standings) and a total of 1,178 strikeouts. They’ve walked 410 batters this season, with a FIP of 4.13 across the unit.

The Mariners’ bullpen is operating with a save percentage of 62.1%, having entered 135 save situations. Of 123 inherited runners, 25.2% have scored. Relievers have been called upon in high-pressure scenarios 186 times with 112 instances having runners aboard. Over the season, Seattle has utilized 462 relievers, achieving 77 holds (15th in MLB) and converting 36 of 58 save opportunities.

Defensively, the Mariners have converted 70.3% of balls in play into outs across 11,193 innings, ranking them 11th in the majors. The Seattle team has finalized 3,731 putouts, 1,160 assists, and committed 59 errors, holding a fielding percentage of .988 which ranks 6th among professionals, additionally notching 100 double plays.

George Kirby has pitched 613 innings, accumulating 587 strikeouts in his MLB journey. He maintains a 3.52 ERA (allowing 240 earned runs) with a WHIP of 1.105, having permitted 588 hits (averaging 8.6 hits per 9 innings) and issuing 90 walks. With a career record of 43-32, he has faced 2,500 batters, featuring a FIP of 3.47.

The Rays are posting a slugging percentage of .403 and scoring an average of 4.53 runs per game (13th in MLB). They have tallied 208 doubles and have drawn 393 walks, accumulating 621 runs. With 156 home runs this season, they also have 589 RBIs. Tampa Bay has struck out 1,174 times (ranking 13th in MLB) and registered 1,161 base hits. Their on-base percentage is currently .313, supplemented by a team batting average of .251.

On the pitching front, the Tampa Bay staff has allowed 566 runs with an ERA of 3.88 (523 earned runs). They’ve yielded 178 home runs while allowing 4.20 runs per 9 innings, placing them 10th in the league. The team has a WHIP of 1.213 and a FIP of 4.18. Collectively, they have a K/BB ratio of 8.80 (1,189 strikeouts vs 391 walks) and rank 6th in the league for most hits yielded, with 1,080.

The Rays’ relief pitchers have a percentage of 32.1% inherited runs scoring from 137 inherited base runners. Their bullpen has appeared 127 times in high-leverage scenarios, and on 94 occasions with runners on base. With 132 save situations this season, Tampa has 78 holds alongside 22 blown saves, ranking 25th in MLB with a 58.5% save rate, while sending 430 relievers to the mound this year. They have also completed 31 of 53 save opportunities successfully.

In a total of 10,920 innings played, Tampa Bay’s defensive efficiency stands at 70.7% (7th in MLB). The Rays have successfully executed 127 double plays, holding a fielding percentage of .987 (10th in the league). They have also recorded 1,209 assists, made 64 errors, and achieved 3,640 putouts this season.

Adrian Houser, with a career record of 39-43, boasts a 4.04 ERA, allowing 8.8 hits per 9 innings. His K/BB ratio is 2.00, having faced 3,014 batters throughout his MLB career. He has allowed 315 earned runs with a WHIP of 1.372 and a FIP of 4.0, giving up 689 hits while striking out 550 over his 702 innings pitched.

Who will take the victory in tonight’s MLB battle against the point spread or the moneyline?

Josh Schonwald’s Prediction: Bet on Seattle (-210)

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