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San Diego (27-18) at Seattle (22-25)
- When: May 17 2026, 7:20 PM
- Where: T-Mobile Park, Seattle
- TV: Peacock
San Diego vs Seattle MLB Preview & Pick
Moneyline: Seattle -160
Runline: Seattle -1.5 (+128)
Total: 7.5
San Diego Padres Betting Breakdown
The Padres head into Sunday chasing a complete Vedder Cup sweep, and they will attempt to do it behind a veteran arm finally returning to the major leagues.
San Diego Padres will hand the ball to Lucas Giolito, who makes his long-awaited season debut after spending the offseason waiting for another opportunity. Injuries throughout San Diego’s rotation created the opening, and the Padres are hoping the experienced right-hander can stabilize the back end of the staff immediately.
Giolito remains one of baseball’s more battle-tested veterans when healthy. He posted a strong 10-4 record with a 3.41 ERA last season in Boston and has historically shown the ability to work deep into games while generating strikeouts consistently.
The challenge Sunday becomes timing and sharpness. After several minor-league tune-ups, Giolito now jumps directly into meaningful action against a Seattle lineup desperate to avoid another disappointing series loss at home.
Offensively, San Diego continues producing timely power throughout the lineup. Saturday’s victory showcased the depth this roster possesses, with home runs from Nick Castellanos, Gavin Sheets, and rookie Rodolfo Duran powering another impressive performance.
Duran’s first major league hit arriving as a two-run homer added another emotional spark to a Padres club already playing with significant confidence. San Diego’s offense has consistently pressured Seattle pitching throughout this series by attacking early counts and forcing mistakes over the plate.
If Giolito can simply keep the game manageable through the middle innings, the Padres absolutely possess enough offensive firepower to complete the sweep.
Padres Player Prop Pick: Lucas Giolito Over 4.5 Strikeouts – Even in his first start back, Giolito’s swing-and-miss arsenal should create enough opportunities against a Mariners lineup that continues struggling offensively.
Seattle Mariners Betting Breakdown
The Mariners enter Sunday desperately needing a response after another frustrating stretch pushed them further from consistency.
Seattle Mariners have now dropped three of their last four games and continue searching for rhythm offensively. Seattle briefly climbed above .500 earlier this season, but inconsistency at the plate continues preventing this team from sustaining momentum.
The good news for Seattle is the ball goes to ace right-hander George Kirby.
Kirby enters with a 5-2 record and excellent 2.84 ERA while continuing to display elite command and efficiency. His most recent outing against Houston was another strong performance where he allowed only one run while striking out seven hitters over five innings.
The concern revolves around his limited history against San Diego. Kirby owns an ugly 10.38 ERA in two previous starts against the Padres, and San Diego’s aggressive lineup has historically matched up well against his pitch-to-contact style.
Seattle also hopes to receive healthier offensive contributions Sunday. Injuries and late lineup scratches continue impacting continuity throughout the batting order, particularly with Brendan Donovan and Mitch Garver both unavailable Saturday.
Still, the Mariners remain dangerous at home whenever Kirby controls tempo early. Seattle’s offense performs significantly better when its starters limit traffic and allow the lineup to stay aggressive offensively instead of constantly playing from behind.
This matchup feels critical for Seattle’s confidence moving forward.
Mariners Player Prop Pick: George Kirby Over 5.5 Strikeouts – Kirby’s command and recent form position him well for another productive strikeout outing against an aggressive Padres lineup.
MLB Expert Picks & Final Score Prediction
Seattle desperately needs a stabilizing performance, and Kirby gives the Mariners a strong opportunity to avoid the sweep.
Still, San Diego enters playing with more offensive confidence, while Giolito’s veteran experience could quietly provide enough stability through the early innings. This matchup feels tighter than the odds suggest, especially if Giolito settles in quickly.
Expect a competitive, lower-scoring game with both starters generating strikeouts consistently.
Final Score: Mariners 4, Padres 2
Lean: Seattle -1.5 (+128)
Total: Under 7.5 (-112)
- MLB Baseball Odds source: MyBookie Sportsbook
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