On August 9, 2026 our 3-leg same game parlay for Tampa Bay Rays at Seattle Mariners is built from the bets our model already likes on their own. We rate the whole slip HIGH confidence. Every leg below is a bet our model already rates on its own, so you can see exactly what you are backing and what the book is paying for it.

The legs, one at a time

Chandler Simpson (TBR) Under 1.5 Stolen Bases (-714)

Odds available at draftkings at time of publishing

As the Seattle Mariners host the Tampa Bay Rays, all eyes will be on Chandler Simpson, who has been a spark plug this season. However, when it comes to stolen bases, the odds might not be in his favor today. The Mariners have tightened their base-running game, allowing just 0.5 stolen bases per game at home. Facing the Rays, who boast a solid defense and a pitcher in play that excels at keeping runners at bay, Simpson may find it tough to capitalize on his speed. With an implied probability of nearly 88% for him to stay under 1.5 stolen bases, the trends suggest a likely struggle for Simpson against a disciplined Tampa Bay squad. Given recent matchups and the Mariners’ recent defensive uptick, betting on the “Under” here seems like a smart play, keeping in mind the context of both teams’ current forms.

Cedric Mullins (TBR) Under 1.5 Stolen Bases (-1250)

Odds available at draftkings at time of publishing

As the Mariners gear up to face the Rays this Sunday, all eyes will be on Cedric Mullins and his propensity for stealing bases. However, considering the matchup, betting the under on his stolen bases feels prudent. Tampa Bay's pitching staff has been exceptional in preventing the running game; they rank in the top tier for limiting stolen bases this season. Moreover, Mullins has been a bit quieter on the base paths lately, with only a handful of attempts over the past few games. With the Rays’ pitchers adept at holding runners, and the Mariners likely to focus on getting hits rather than taking risks on the bases, it’s hard to envision Mullins surpassing that 1.5 mark. Given the current trends and matchup dynamics, this feels like a savvy play to take the under and let the game unfold without the risk of Mullins making a splash on the base paths.

Richie Palacios (TBR) Under 1.5 Stolen Bases (-909)

Odds available at draftkings at time of publishing

As the Mariners gear up to host the Rays, all eyes will be on Richie Palacios, but betting on him to steal bases might not be the best call. First off, Palacios hasn't been a base-stealing threat, with recent performances suggesting that he’s more focused on getting on base than taking risks. Moreover, the Mariners’ outfield is typically quick to cut down potential steals, and with the Rays’ aggressive base-running tactics, they might keep Palacios on a tighter leash. Seattle’s pitchers are known for their quick deliveries, making it even tougher for a player like Palacios to swipe second. With an implied probability of over 90% for him to stay under 1.5 stolen bases, it seems the smart play here is to side with the numbers. Expect a disciplined approach from Palacios, especially against a well-prepared Mariners squad.

That is the whole read. Every leg above is our own number against the price on the board at the time we wrote this, and the price can move before you get on. Bet what you can afford to lose. If betting stops being fun, take a break.

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