Rays vs. Mariners Dunkel MLB Picks, Predictions and Prop Bets - July 12

The Tampa Bay Rays aim to sweep a three-game series versus the Seattle Mariners, at 1:40 p.m. ET on Sunday. Ian Seymour (6-1, 4.11 ERA) will start for the Rays, who are 56-37 this season and first in the AL East. Emerson Hancock (6-4, 3.23 ERA) is expected to start for the Mariners, who are 47-49 and second in the AL West.

With the Mariners (+119) visiting, the Rays (-146) are a solid favorite on the moneyline. The over/under for the Rays-Mariners game is set at 7.5.

Rays vs. Mariners Odds, Game Time

• Game day: Sunday, July 12, 2026
• Game time: 1:40 p.m. ET
• Location: St. Petersburg, Florida
• Stadium: Tropicana Field
• Favorite: Rays (-146)
• Underdog: Mariners (+119)
• Over/under: 7.5

How to Watch Rays vs. Mariners

• TV Channel: RAYS and SEAM
• Live Stream: Fubo (Watch for free)

Bet now on FanDuel Sportsbook!

Rays vs. Mariners: Betting the Moneyline

• The Rays have put together a 40-20 record in games they were listed as the moneyline favorite (winning 66.7% of those games).
• Seattle has won in three, or 23.1%, of the 13 contests it has been named as odds-on underdogs in this year.
• This season Tampa Bay has won 10 of its 15 games, or 66.7%, when favored by at least -146 on the moneyline.
• Oddsmakers have given the Mariners the worst odds of winning they have seen this season with a +119 moneyline listed for this contest.
• The Rays have a 59.3% chance to win this game based on the moneyline's implied probability.
• The moneyline set for this matchup implies the Mariners have a 45.7% chance of coming away with a victory in the contest.

Rays vs. Mariners: Betting the Spread & Total

• The Rays have had an over/under set by oddsmakers 93 times, and have combined with opponents to go over the total in 41 of those games (41-46-6).
• Seattle's games have gone over the total in 46 of its 96 chances.
• The Rays have put together a 55-38-0 record against the spread this season.
• The Mariners are 37-59-0 against the spread in their 96 games with a line set by sportsbooks this season.