Mariners vs Diamondbacks Prediction, Odds, Moneyline, Spread & Over/Under for May 30

Odds updated as of 4:13 a.m.

The Saturday schedule in MLB includes a matchup between the Seattle Mariners and the Arizona Diamondbacks.

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

Mariners vs Diamondbacks Game Info

• Seattle Mariners (29-29) vs. Arizona Diamondbacks (31-25)
• Date: Saturday, May 30, 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: (-158) | ARI: (+134)
• Spread: SEA: -1.5 (+146) | ARI: +1.5 (-178)
• Total: 7 -- Over: (-110) | Under: (-110)

Mariners vs Diamondbacks Probable Starting Pitchers

Probable Pitchers: Bryan Woo (Mariners) - 4-3, 3.82 ERA vs Ryne Nelson (Diamondbacks) - 2-3, 4.65 ERA

The Mariners will give the ball to Bryan Woo (4-3, 3.82 ERA), who is eyeing win No. 5 on the season, and the Diamondbacks will counter with Ryne Nelson (2-3, 4.65 ERA). When Woo starts, his team is 6-5-0 against the spread this season. Woo's team has a record of 6-5 this season when he starts and they are the favorite on the moneyline. The Diamondbacks have a 5-6-0 record against the spread in Nelson's starts. The Diamondbacks have been the moneyline underdog in eight of Nelson's starts this season, and they went 2-6 in those games.

Mariners vs Diamondbacks Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (60.9%)

Mariners vs Diamondbacks Moneyline

• The moneyline numbers for Mariners vs. Diamondbacks reveal Seattle as the favorite (-158) and Arizona as the underdog (+134) on the road.

Mariners vs Diamondbacks Spread

• The Diamondbacks are +1.5 on the run line against the Mariners. The Diamondbacks are -178 to cover, and the Mariners are +146.

Mariners vs Diamondbacks Over/Under

• The over/under for Mariners-Diamondbacks on May 30 is 7. The over is -110, and the under is -110.

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

Mariners vs Diamondbacks Betting Trends

• The Mariners have been chosen as favorites in 53 games this year and have walked away with the win 27 times (50.9%) in those games.
• This season Seattle has been victorious seven times in 12 chances when named as a favorite of at least -158 on the moneyline.
• The Mariners and their opponents have gone over in 27 of their 58 games with a total set by sportsbooks this season.
• The Mariners have posted a record of 22-36-0 against the spread this season.
• The Diamondbacks have been the underdog on the moneyline 29 total times this season. They've gone 11-18 in those games.
• When it has played as a moneyline underdog with odds of +134 or longer, Arizona has a 3-4 record (winning 42.9% of its games).
• The Diamondbacks have played in 55 games with a set over/under, and have combined with opponents to go over the total 28 times (28-25-2).
• The Diamondbacks have a 33-22-0 record ATS this season (covering 60% of the time).

Mariners Player Leaders

• Randy Arozarena has 63 hits and an OBP of .382 to go with a slugging percentage of .467. All three of those stats rank first among Seattle hitters this season. He has a .297 batting average, as well.
• Among all qualifying hitters in baseball, he is 13th in batting average, 23rd in on-base percentage, and 45th in slugging.
• Arozarena has picked up at least one hit in five straight games. In his last five games he is batting .320 with three doubles, a home run and five RBIs.
• Julio Rodriguez is hitting .265 with 12 doubles, 11 home runs and 18 walks, while slugging .457 with an on-base percentage of .323.
• Among all qualified hitters, he is 58th in batting average, 94th in on-base percentage and 51st in slugging percentage.
• Rodriguez heads into this game looking to extend his five-game hit streak. In his last five games he is batting .333 with a double, three home runs and eight RBIs.
• Josh Naylor has collected 55 base hits, an OBP of .323 and a slugging percentage of .352 this season.
• Naylor has recorded a hit in five straight games. During his last five outings he is batting .364 with two walks and two RBIs.
• J.P. Crawford has nine home runs, 22 RBI and a batting average of .218 this season.
• Crawford brings a five-game hitting streak into this game. In his last five games he is batting .348 with three home runs, a walk and six RBIs.

Diamondbacks Player Leaders

• Corbin Carroll has accumulated an on-base percentage of .390 and has 57 hits, both team-best marks for the Diamondbacks. He's batting .294 and slugging .546.
• Including all the qualifying hitters in the majors, he is 18th in batting average, 16th in on-base percentage and ninth in slugging percentage.
• Ketel Marte paces his team with a .467 slugging percentage. He has a batting average of .271 with an on-base percentage of .326.
• His batting average is 49th among all qualified players, his on-base percentage is 87th, and he is 45th in slugging.
• Ildemaro Vargas is batting .295 with nine doubles, two triples, seven home runs and seven walks.
• Geraldo Perdomo is batting .232 with nine doubles, three triples, three home runs and 32 walks.

Mariners vs Diamondbacks Head to Head

• 5/29/2026: 7-6 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -142, Underdog Moneyline: +120)
• 6/11/2025: 5-2 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 9, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 6/10/2025: 10-3 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 9.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 6/9/2025: 8-4 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 9, Favorite Moneyline: -174, Underdog Moneyline: +146)
• 4/28/2024: 3-2 ARI (Favorite: Mariners, Spread: -1.5, Total: 6.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 4/27/2024: 3-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -156, Underdog Moneyline: +132)
• 4/26/2024: 6-1 SEA (Favorite: Diamondbacks, Spread: -1.5, Total: 7.5, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 7/30/2023: 4-0 SEA (Favorite: Diamondbacks, Spread: -1.5, Total: 8, Favorite Moneyline: -110, Underdog Moneyline: -106)
• 7/29/2023: 4-3 ARI (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -110, Underdog Moneyline: -106)
• 7/28/2023: 5-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 9, Favorite Moneyline: -136, Underdog Moneyline: +116)

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