Diamondbacks vs Mariners Starters and Free Prediction [5/29/26]

Arizona (31-24) at Seattle (28-29)
When: Friday, May 29th 2026
Where: T-Mobile Park,
Seattle, WA

Time: 10:10 ET | TV: MLB.tv
Opening Odds: Seattle -140/7

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Diamondbacks vs Mariners Recent Meetings

Courtesy of Covers.com
Courtesy of Covers.com
Courtesy of Covers.com


Prediction

One of the hottest teams in the league looks to continue that on Friday night, as the Arizona Diamondbacks head to Seattle to open a three-game set. Arizona is just coming off a sweep in San Francisco and have won nine of their last 10 overall. The pitching has been solid as well. The staff has held eight of their last 10 opponents to three runs or less. The Mariners are also coming off a sweep, but have lost four in a row to the D’backs. The pitching matchup edge goes to Kirby, but Gallen has pitched better in his last two starts and I like the Arizona offense to give him enough runs tonight.

Pick: Diamondbacks +130

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Jay has been watching and following sports since he could walk and turned to betting in his late teens. His favorite sport is MLB and has been producing winners on UltimateCapper for almost 25 years. Follow Jay's free sports picks and enjoy the winners.