Tampa Bay Rays vs Seattle Mariners Prediction, Preview and Odds - 08/08/2026

Game Time: 9:50 pm ET, Saturday, August 8, 2026

Venue:  T-Mobile Park, Seattle, WA 

Where to Watch:  ESPN Unlimited, MLB TV

DraftKings:  Moneyline odds:  Rays +101, Mariners -122; Over/Under:  7.5 runs

Bet365:  Moneyline odds:  Rays +100, Mariners -120; Over/Under:  7 runs

BetMGM:  Moneyline odds:  Rays +100, Mariners -120; Over/Under:  7 runs

Tampa Bay Rays:  68-46 (1st place, AL East)

Seattle Mariners:  56-60 (3rd place, AL West)

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Tampa Bay Rays:  7-3 last 10

Seattle Mariners:  4-6 last 10

The Rays are entering this series off a win and completed the sweep in their 3-game series against the Colorado Rockies 3-0 in their last series. They enter this game with a 68-46 record overall and have a road record of 27-28. This is the 2nd game of a 3-game series with the Mariners on Saturday with the series opener still to be played on Friday. Their offense ranks 9th in the MLB with a .732 OPS. Drew Rasmussen is their starting pitcher on Friday while Griffin Jax is making his start in this game on Saturday. He is 6-9 with a 3.63 ERA this season. His team lost their last 2 straight games this season with him making an appearance. In his last MLB regular season appearance, he allowed 1 ER, 1 HR, and 0 BB with 8 SO on 4 hits through 5 IP against the Chicago White Sox.

The Mariners are entering this series off a loss and lost their 3-game series against the Detroit Tigers 2-1 in their last series. They enter this game with a 56-60 record overall and have a home record of 33-26. This is the 2nd game of a 3-game series with the Rays on Saturday with the 1st game of this series still to be played on Friday. Their offense ranks 28th in the MLB with a .687 OPS. Logan Gilbert is their starting pitcher on Friday while George Kirby is making his start in this game on Saturday. He is 8-9 with a 3.76 ERA this season. His team won 2 of their last 3 games this season with him making an appearance. In his last MLB regular season start, he allowed 0 earned runs, 0 homers, and 1 walk with 3 strikeouts on 5 hits through 7 innings pitched against the Minnesota Twins.

The current betting odds have the Rays listed as a slight underdog in this game according to Draftkings Sportsbook. The Rays have looked great in their games this season with their 68-46 record overall which has them right at the top of the AL East. They haven't been a great road team though with their 27-28 road record this year. Meanwhile, the Mariners haven't looked good in their games this season with their 56-60 record overall which has them right in the middle of the AL West. They have looked a lot better in their own ballpark though with their 33-26 home record this season. The Mariners haven't looked good in their games lately, now 4-6 in their last 10 games with a terrible offense. The Rays have been rolling though, now 7-3 in their last 10 games, and they have a much stronger offense along with the better pitching staff too. Kirby is on the mound for the Mariners in this one and he has looked good this season. He is 8-9 with a 3.76 ERA and he has looked a lot better lately. He is coming off another great start in which he gave up no runs and the team has won 2 of their last 3 games with him starting, but even with a good start from him in this one, the offense has been nowhere to be found over the last few weeks. The Rays are going with Jax in this one and he hasn't looked bad this season. He is 6-9 with a 3.63 ERA and he hasn't been giving up many runs lately. The team has lost 2 games in a row now with him starting, but he only gave up 1 earned run in his last start and the bullpen has been great for the Rays all season too. The Mariners have been in a bad slump lately, so look for the Rays to continue rolling here. The best way to place a bet here is on the Rays to win this game. 

Rays Mariners Prediction:  Our MLB Pick for Saturday, August 8, 2026 (9:50 pm ET start time) is Rays 3 Mariners 0.

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Tampa Bay Rays: 39-40 (-6.4 units) on the moneyline against AL West opponents. 100-116 (-7.4 units) on the moneyline in road games. 142-144 (-15.6 units) on the moneyline vs. an AL team with an on base percentage .330 or worse. 40-26 UNDER vs. a team with a good bullpen whose WHIP is 1.350 or better.

Seattle Mariners: 136-92 (+14.5 units) on the moneyline in home games. 83-66 (+9.2 units) on the moneyline vs. an AL starting pitcher whose WHIP is 1.300 or better. 58-40 (+15.9 units) on the moneyline vs. an AL starting pitcher whose ERA is 3.70 or better. 13-6 UNDER at home when the money line is +125 to -125.

Tampa Bay Rays:  J. Fraley (RF) Sixty Day IL - Groin. S. McClanahan (SP) Fifteen Day IL - Back. C. Wilcox (RP) Fifteen Day IL - Back. J. Heasley (RP) Sixty Day IL - Elbow. G. Lux (LF) Sixty Day IL - Shoulder. R. Pepiot (SP) Sixty Day IL - Hip. E. Uceta (RP) Sixty Day IL - Shoulder. M. Rodriguez (RP) Sixty Day IL - Elbow.

Seattle Mariners:  C. Wilcox (RP) Day To Day - Oblique. L. Raley (RF) Ten Day IL - Elbow. J. Crawford (SS) Ten Day IL - Wrist. W. Wilson (3B) Sixty Day IL - Thumb. M. Brash (RP) Fifteen Day IL - Lat. C. Criswell (RP) Sixty Day IL - Shoulder. C. Vargas (RP) Sixty Day IL - Lat. L. Evans (SP) Sixty Day IL - Arm.

“Kind of in the fire right there, two guys on in a three-run ballgame. Threw a bunch of strikes. Nasty stuff.” - Kevin Cash after his team’s win against the Rockies in their game on Wednesday. 

“He didn't come out very sharp from the get-go and made us play catch-up baseball. But we couldn't do anything offensively, anyways.” - Manny Acta after his team’s loss against the Tigers in their game on Thursday.

Victor Mesa Jr. (L) RF

Jonathan Aranda (L) DH

Junior Caminero (R) 3B

Liam Hicks (L) 1B

Chandler Simpson (L) LF

Cedric Mullins (L) CF

Richie Palacios (L) 2B

Taylor Walls (S) SS

Nick Fortes (R) C

Taylor Ward (R) RF

Randy Arozarena (R) LF

Dominic Canzone (L) DH

Julio Rodríguez (R) CF

Cole Young (L) 2B

Weston Wilson (R) 1B

Jhonny Pereda (R) C

Leo Rivas (S) 3B

Colt Emerson (L) SS

Batting Average:  Yandy Díaz (.300)

Hits:  Yandy Díaz (127)

Home Runs:  Junior Caminero (33)

RBI:  Jonathan Aranda (71)

Stolen Bases:  Chandler Simpson (30)

Wins:  Nick Martinez (11)

Saves:  Bryan Baker (32)

ERA:  Tyler Wells (0.00)

Batting Average:  Randy Arozarena (.285)

Hits:  Randy Arozarena (113)

Home Runs:  Dominic Canzone (18)

RBI:  Cole Young (51)

Stolen Bases:  Josh Naylor (22)

Wins:  George Kirby (8)

Saves:  Andrés Muñoz (20)

ERA:  Matt Brash (0.54)

Managers:

Tampa Bay Rays: Kevin Cash (12th season)

Seattle Mariners: Dan Wilson (3rd season)