The Seattle Mariners host the Tampa Bay Rays on August 8, 2026. First pitch from T-Mobile Park is scheduled for 9:50 p.m. EDT. The game will be broadcast on SEAM.
Find my MLB picks and Rays vs Mariners prediction below.
Rays vs Mariners Prediction
- Rays vs Mariners Pick: Under 7.5 (56c, Polymarket)
Rays vs Mariners Polymarket MLB Odds
Rays vs Mariners Probable Pitchers
| Griffin Jax (RHP, TBR) | Stat | George Kirby (RHP, SEA) |
|---|---|---|
| 6-9 | W-L | 8-9 |
| 1.1 | fWAR (FanGraphs) | 2.2 |
| 3.63 / 4.39 | ERA / xERA | 3.76 / 3.87 |
| 3.94 / 3.34 | FIP / xFIP | 3.58 / 3.72 |
| 18.5% | K-BB% | 16.1% |
| 45.2% | GB% | 45.2% |
| .288 | BABIP | .328 |
| 104 | Stuff+ | 101 |
| 106 | Location+ | 111 |
Rays vs Mariners MLB Preview
Our own Sean Zerillo projects some value on the Under in this game.
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Rays vs Mariners Pick
There are a few key parts to this handicap.
First, T-Mobile is arguably the most pitcher-friendly park in the Majors, reducing the run-scoring environment by about 17%. Additionally, umpire Emil Jimenez is slightly pitcher-friendly, further reducing the run-scoring environment by another 2%.
Next, this is a superstar pitching matchup between Griffin Jax and George Kirby, two of our top-30 MLB SPs.
Finally, these two squads have top-10 bullpens, and both units are fully rested.
Altogether, those are a few of the most significant reasons why Zerillo projects just 6.66 runs in this matchup.
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Pick: Under 7.5 (56c, Polymarket)
