A series opener between the Seattle Mariners (73-64) and Tampa Bay Rays (67-69) is on deck Monday at 7:35 p.m. ET, at George M. Steinbrenner Field.
The Mariners are a tight favorite (-119 moneyline odds to win) when they square off against the Rays (-100). The Seattle Mariners will give the start to Luis Castillo (8-7, 3.75 ERA), who is looking for win No. 9 on the season, and the Rays will counter with Shane Baz (8-11, 5.19 ERA).
The Mariners won their last contest versus the Guardians by a 4-2 score yesterday, with Bryce Miller picking up the win pitching throwing six innings, giving up two earned runs on two hits while striking out three. Randy Arozarena went 1 for 5 with a home run and two RBIs to lead them offensively.
The Rays defeated the Nationals 7-4 yesterday. Brandon Lowe went 1 for 4 with a home run and four RBIs, and Ian Seymour got the win, throwing five innings, giving up one earned run on four hits while striking out eight.
Ahead of this Mariners vs. Rays showdown, here’s what you need to get ready for Monday’s MLB action, including viewing options.
Seattle Mariners vs. Tampa Bay Rays odds, line and spread
MLB odds courtesy of BetMGM Sportsbook. Odds updated Sunday at 9:16 p.m. ET. For a full list of sports betting odds, access USA TODAY Sports Betting Scores Odds Hub.
Favorite: Mariners (-119, bet $119 to win $100)Underdog: Rays (-100, bet $100 to win $100)Over/under: 8.5Mariners vs. Rays: Game time and live stream infoGame day: Monday, September 1, 2025Game time: 7:35 p.m. ETLocation: Tampa, FloridaStadium: George M. Steinbrenner FieldTV channel: FDSSUN and ROOT Sports NWLive stream: Watch LIVE with Fubo! (Regional restrictions may apply)
Watch Mariners vs. Rays on Fubo!
Mariners stats and trendsMariners betting recordsThe Mariners have entered the game as favorites 95 times this season and won 52, or 54.7%, of those games.Seattle has entered 84 games this season favored by -119 or more and is 46-38 in those contests.Bookmakers have implied with the moneyline set for this matchup that the Mariners have a 54.3% chance to win.So far this season, Seattle and its opponents have hit the over in 72 of 137 games with a total.The Mariners are 56-81-0 against the spread this season.Luis Castillo (Mariners probable starter)The Mariners are sending Castillo (8-7) to the mound for his 28th start of the season. He is 8-7 with a 3.75 ERA and 133 strikeouts through 151 1/3 innings pitched.The righty last pitched on Wednesday against the San Diego Padres, when he tossed five innings, allowing five earned runs while giving up five hits.The 32-year-old has put up an ERA of 3.75, with 7.9 strikeouts per nine innings, in 27 games this season. Opponents are hitting .257 against him.Castillo enters the game with 14 quality starts under his belt this year.Castillo heads into this game with 23 outings of five or more innings pitched this year.In six of his appearances this season he did not surrender an earned run.He will take the hill against a Rays offense that ranks 15th in MLB with 1148 total hits (on a .250 batting average). The team also slugs a collective .401 (15th in MLB) with 154 total home runs (16th in MLB).Castillo has a 2.57 ERA and a 0.714 WHIP against the Rays this season in seven innings pitched, allowing a .200 batting average over one appearance.The 32-year-old’s 3.75 ERA ranks 30th, 1.282 WHIP ranks 34th, and 7.9 K/9 ranks 36th among qualifying pitchers this season.Mariners batting statsThe Mariners have hit 195 homers this season, which ranks third in the league.Fueled by 388 extra-base hits, Seattle ranks 11th in MLB with a .410 slugging percentage this season.The Mariners have a team batting average of .242 this season, which ranks 21st among MLB teams.Seattle has scored the 11th-most runs in the majors this season with 627 (4.6 per game).The Mariners have an OBP of .318 this season, which ranks 12th in MLB.Seattle is one of the least-disciplined teams at the plate this season, ranking 28th with an average of 8.9 strikeouts per game.Rays stats and trendsRays betting recordsThe Rays have been chosen as underdogs in 68 games this year and have walked away with the win 27 times (39.7%) in those games.This season, Tampa Bay has been victorious 21 times in 48 chances when named as an underdog of at least -100 or longer on the moneyline.The moneyline set for this matchup implies the Rays have a 50% chance of walking away with the win.Contests with Tampa Bay has gone over the total set by oddsmakers in 57 of 136 chances this season.The Rays are 62-74-0 against the spread in their 136 games that had a posted line this season.Shane Baz (Rays probable starter)Baz gets the start for the Rays, his 27th of the season. He is 8-11 with a 5.19 ERA and 150 strikeouts in 144 2/3 innings pitched.The righty last appeared on Tuesday against the Cleveland Guardians, when he threw six innings, allowing three earned runs while giving up three hits.In 26 games this season, the 26-year-old has amassed an ERA of 5.19, with 9.4 strikeouts per nine innings. Opponents are hitting .254 against him.Baz has collected 10 quality starts this season.Baz is looking to secure his 21st start of five or more innings this year in this outing.He has had four appearances this season that he kept his opponents to zero earned runs.He will face off against a Mariners offense that ranks 20th in the league with 1124 total hits (on a .242 batting average). The team also slugs a collective .410 (11th in the league) with 195 total home runs (third in MLB play).Among pitchers who qualify in MLB play this season, the 26-year-old ranks 51st in ERA (5.19), 50th in WHIP (1.347), and 19th in K/9 (9.4).Rays batting statsThe Rays average 1.1 home runs per game to rank 16th in MLB play with 154 total home runs.This season, Tampa Bay’s .401 slugging percentage ranks 15th in baseball.The Rays have the 10th-best batting average in the majors (.250).Tampa Bay scores the 13th-most runs in baseball (611 total, 4.5 per game).The Rays’ .312 on-base percentage ranks 19th in MLB.