Mariners vs Diamondbacks Prediction, Odds, Moneyline, Spread & Over/Under for May 29

Odds updated as of 12:13 p.m.

The MLB slate on Friday includes the Seattle Mariners facing the Arizona Diamondbacks.

We've got you covered, in terms of the most important information regarding this game before you take a look at the MLB odds and spreads on FanDuel Sportsbook.

Mariners vs Diamondbacks Game Info

• Seattle Mariners (28-29) vs. Arizona Diamondbacks (31-24)
• Date: Friday, May 29, 2026
• Time: 10:10 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: Mariners.TV and Dbacks.TV

Mariners vs Diamondbacks Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-152) | ARI: (+128)
• Spread: SEA: -1.5 (+142) | ARI: +1.5 (-172)
• Total: 7.5 -- Over: (+102) | Under: (-124)

Mariners vs Diamondbacks Probable Starting Pitchers

Probable Pitchers: George Kirby (Mariners) - 5-4, 3.54 ERA vs Zac Gallen (Diamondbacks) - 3-4, 4.80 ERA

The Mariners will call on George Kirby (5-4) against the Diamondbacks and Zac Gallen (3-4). Kirby's team is 5-6-0 against the spread this season in his starts. When Kirby starts a game and his team is the favorite on the moneyline, they have a record of 6-5. When Gallen starts, the Diamondbacks have gone 6-5-0 against the spread. The Diamondbacks have been the moneyline underdog in six of Gallen's starts this season, and they went 2-4 in those matchups.

Mariners vs Diamondbacks Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (60.8%)

Mariners vs Diamondbacks Moneyline

• The Mariners vs Diamondbacks moneyline has Seattle as a -152 favorite, while Arizona is a +128 underdog on the road.

Mariners vs Diamondbacks Spread

• The Mariners are hosting the Diamondbacks and are favored by 1.5 runs (+142 to cover) on the runline. Arizona is -172 to cover.

Mariners vs Diamondbacks Over/Under

• A total of 7.5 runs has been set for the Mariners-Diamondbacks game on May 29, with the over available at +102 and the under at -124.

Bet on Seattle Mariners vs. Arizona Diamondbacks on FanDuel today!

Mariners vs Diamondbacks Betting Trends

• The Mariners have been chosen as favorites in 52 games this year and have walked away with the win 26 times (50%) in those games.
• Seattle has a record of 10-6 when favored by -152 or more this year.
• The Mariners and their opponents have gone over in 26 of their 57 games with a total set by sportsbooks this season.
• The Mariners have an against the spread record of 22-35-0 in 57 games with a line this season.
• The Diamondbacks have been the moneyline underdog 28 total times this season. They've gone 11-17 in those games.
• In games it has played as a moneyline underdog with odds of +128 or longer, Arizona has a record of 4-6 (40%).
• In the 54 games oddsmakers have set an over/under for the Diamondbacks, they have combined with opponents to go over the total 27 times (27-25-2).
• The Diamondbacks have a 32-22-0 record against the spread this season (covering 59.3% of the time).

Mariners Player Leaders

• Randy Arozarena has 61 hits and an OBP of .382 to go with a slugging percentage of .464. All three of those stats rank first among Seattle hitters this season. He has a .295 batting average, as well.
• Among the qualified hitters in the majors, his batting average ranks 19th, his on-base percentage ranks 21st, and he is 43rd in slugging.
• Arozarena has recorded at least one hit in four games in a row. During his last five outings he is batting .261 with two doubles, a home run and four RBIs.
• Julio Rodriguez has 11 doubles, 10 home runs and 18 walks. He's batting .258 and slugging .437 with an on-base percentage of .317.
• Among all qualified batters, he ranks 71st in batting average, 103rd in on-base percentage and 61st in slugging percentage.
• Rodriguez brings a four-game streak with at least one hit into this matchup. During his last five outings he is hitting .227 with two home runs, a walk and six RBIs.
• Josh Naylor is batting .258 with a .354 slugging percentage and 24 RBI this year.
• Naylor has recorded a hit in four games in a row. During his last five outings he is batting .333 with a walk and two RBIs.
• J.P. Crawford is batting .212 with a .338 OBP and 19 RBI for Seattle this season.
• Crawford heads into this game on a four-game hitting streak. During his last five outings he is batting .261 with a home run and three RBIs.

Diamondbacks Player Leaders

• Corbin Carroll has racked up 55 hits with a .392 on-base percentage, leading the Diamondbacks in both categories. He's batting .293 and slugging .553.
• Including all the qualified hitters in the majors, his batting average places him 22nd, his on-base percentage ranks 11th, and he is ninth in slugging.
• Ketel Marte leads his team with a .476 slugging percentage. He has a batting average of .276 with an on-base percentage of .326.
• Including all qualified hitters, his batting average places him 40th, his on-base percentage ranks 89th, and he is 35th in slugging.
• Ildemaro Vargas has nine doubles, two triples, seven home runs and seven walks while batting .303.
• Nolan Arenado has 11 doubles, seven home runs and 18 walks while hitting .271.

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