MLB Prop Bets: Tampa Bay Rays vs Seattle Mariners (July 12, 2026)
The Seattle Mariners (47-49) face the Tampa Bay Rays (56-37) at Tropicana Field on Sunday at 1:40pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Emerson Hancock is the probable pitcher for the Mariners, while Ian Seymour is the probable pitcher for the Rays. The Rays are favored to win at -131, while the Mariners are at +108. The total runs line is set at 8.0, with OVER at -102 and UNDER at -118.
- The Mariners (-193) have a 40-56 Run Line record this season, while the Rays (+159) hold a record of 55-38.
- The Mariners have a 46-45-5 O/U record this season (meaning 46 games have gone over the total runs line, 45 have gone under and five have resulted in a push). The Rays have a 41-48-4 O/U record.
Scoring Insights
- The Mariners are averaging 4.0 runs per game this season (28th in the league). Comparatively, the Rays are averaging +0.5 more at 4.5 runs (14th).
- In the field, the Mariners are allowing only 3.9 runs per game this season (6th in the league), while the Rays are allowing an average of 4.1 runs (9th).
Let's take a look at how these teams perform in some other key statistical areas.
Batting Insights:
Batting Average
- Looking at their batting averages this season, the Rays are at an impressive .260 (ranking 3rd in the Major leagues), while the Mariners are batting an underwhelming .229 (28th).
Home Runs
- In terms of total home runs this season, the Rays have hit 93 (26th in the Major Leagues). Meanwhile, the Mariners have managed 113 (15th).
Runs Batted In
- Finally, looking at their runs batted in, the Mariners have recorded 370 RBIs to rank 27th in the MLB this season. Comparatively, the Rays have recorded 402 RBIs to rank 18th.
Pitching Insights:
Earned Run Average
- The Rays have an earned run average of 3.76 this season (9th in the Majors), while The Mariners have an ERA of 3.63 (6th).
Strikeouts
- Turning our attention to total strikeouts, the Mariners have recorded 817 this season, ranking 11th in the MLB. Meanwhile, the Rays rank 24th for total strikeouts, recording 753.
Opponent Batting Average
- Opponents are batting an average of .232 against the Rays this season (6th in the Major Leagues). Comparatively, the Mariners' opponents are at .241 (15th).
First Innings Moneyline
- Here are their first innings moneyline records in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Mariners | 22-20-54 | 13-11-23 | 9-9-31 | 21-17-43 | 1-3-11 | 0-0-0 | 0-0-10 |
| Rays | 25-17-51 | 14-9-26 | 11-8-25 | 18-14-30 | 7-3-21 | 0-0-0 | 1-2-7 |
Lead After Three Innings
The Mariners are +110 to lead after three innings, while the Rays are -140.
- Here are their records after the first three innings in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Mariners | 39-34-23 | 22-14-11 | 17-20-12 | 32-28-21 | 7-6-2 | 0-0-0 | 2-6-2 |
| Rays | 38-27-28 | 21-15-13 | 17-12-15 | 30-21-11 | 8-6-17 | 0-0-0 | 5-2-3 |
NRFI/YRFI
The NRFI market is paying -115 and the YRFI is paying -115.
- The NRFI is 49-47 in Mariners games this season. The Rays have a 47-46 NRFI record.
Last Time They Met
The Rays recorded a 6-1 victory over the Mariners at Tropicana Field yesterday. Ben Williamson went yard en route to that victory, hitting a home run to go with an RBI. The Rays have now won five straight against the Mariners.
