The Tampa Bay Rays host the Seattle Mariners on July 12, 2026. First pitch from Tropicana Field is scheduled for 1:40 p.m. EDT. The game will be broadcast on SEAM.
The Rays are favored by -134 on the moneyline and by -1.5 on the run line. The Mariners are +114 on the moneyline and +1.5 on the run line. The total is set at 7.5 runs.
Find our MLB picks and Mariners vs Rays prediction below, as well as probable pitchers, weather report, and more.
Mariners vs Rays Prediction
- Mariners vs Rays Pick: Ian Seymour Over 5.5 Strikeouts (-136)
Our Mariners vs Rays best bet is on Tampa Bay starting pitcher Ian Seymour to go over his strikeout prop. Make sure to find the best odds by checking our live MLB odds page.
Mariners vs Rays Odds
| Mariners Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
+1.5 -196 | 7.5 -118o / -104u | +114 |
| Rays Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
-1.5 +162 | 7.5 -118o / -104u | -134 |
- Mariners vs Rays moneyline: Mariners +114, Rays -134
- Mariners vs Rays over/under: 7.5 (-118o / -104u)
- Mariners vs Rays spread: Rays -1.5 (+162), Mariners +1.5 (-196)
Mariners vs Rays Probable Pitchers
| RHP Emerson Hancock (SEA) | Stat | LHP Ian Seymour (TBR) |
|---|---|---|
| 6-4 | W-L | 6-1 |
| 1.6 | fWAR (FanGraphs) | 0.8 |
| 3.23/4.34 | ERA / xERA | 4.11/3.23 |
| 3.67/3.77 | FIP / xFIP | 3.83/3.90 |
| 17.7% | K-BB% | 20.3% |
| 41.1% | GB% | 30.2% |
| .250 | BABIP | .247 |
| 100 | Stuff+ | 105 |
| 107 | Location+ | 100 |
Mariners vs Rays MLB Betting Preview
The Tampa Bay Rays look to complete a series sweep at Tropicana Field this Sunday when they host the Seattle Mariners for the final installment of their three-game set.
Tampa Bay has entirely controlled the matchup so far, securing a 7-2 victory in the opener before cruising to a 6-1 win on Saturday. A significant catalyst in yesterday's victory was infielder Ben Williamson, who paced the offense with a stellar four-hit performance against Seattle's pitching staff.
Sitting in first place in the AL East with an impressive 56-37 overall record, the Rays have been incredibly dominant at home, boasting a 35-14 record in St. Petersburg.
Their success is heavily tied to elite run prevention, as they hold a commanding 20-5 record in games where they do not surrender a home run.
They will hand the ball to left-hander Ian Seymour, who enters Sunday with a 6-1 record, a 4.11 ERA, a 1.08 WHIP, and 72 strikeouts on the year.
The struggling Mariners are trying to salvage a road trip that has seen them drop to 47-49 overall, landing them in second place in the AL West.
Traveling has been a major weak spot for Seattle, as evidenced by their poor 20-29 record on the road.
Despite their offensive shortcomings, the Mariners still rely on one of the premier pitching staffs in the league, carrying baseball’s sixth-best team ERA at 3.64.
Right-hander Emerson Hancock will take the mound for Seattle, bringing a 6-4 record, a 3.23 ERA, a 1.01 WHIP, and 92 strikeouts into this afternoon's battle.
Mariners vs Rays Pick, Betting Analysis
The top betting angle for this final game before the break centers on the strikeout prop for Tampa Bay starter Ian Seymour.
While the sportsbooks have locked his strikeout line at Over/Under 5.5 with odds sitting around -136, the projection models suggest there is tremendous value on the over.
Action PRO actually projects Seymour to finish with 6.70 strikeouts against Seattle this afternoon. That numbers-based projection gives bettors an excellent 8.3% mathematical edge over the standard market line.
The Mariners have been highly prone to punching out, making this matchup ideal for an ascending young pitcher who relies on his ability to miss bats.
Furthermore, Seymour's recent form strongly backs up this projection. The left-handed starter has been absolutely electric over his last few turns in the rotation.
He is coming off a massive 12-strikeout masterpiece against the New York Yankees on July 7, which was preceded by consecutive, highly efficient outings of 8 and 7 strikeouts against the Kansas City Royals.
Given his current momentum and Seattle's swing-and-miss tendencies, hitting at least six strikeouts looks like the smartest play on the board.
Pick: Ian Seymour Over 5.5 Strikeouts (-136)
