Diamondbacks vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for June 9

Odds updated as of 7:11 a.m.

The Arizona Diamondbacks will take on the Seattle Mariners in MLB action on Monday.

Here's everything you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

Diamondbacks vs Mariners Game Info

• Arizona Diamondbacks (31-34) vs. Seattle Mariners (33-31)
• Date: Monday, June 9, 2025
• Time: 9:40 p.m. ET
• Venue: Chase Field -- Phoenix, Arizona
• Coverage: Fox Sports 1, ARID, and ROOT Sports NW

Diamondbacks vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: ARI: (-168) | SEA: (+142)
• Spread: ARI: -1.5 (+116) | SEA: +1.5 (-140)
• Total: 9 -- Over: (-128) | Under: (+104)

Diamondbacks vs Mariners Probable Starting Pitchers

Probable Pitchers: Merrill Kelly (Diamondbacks) - 6-2, 3.43 ERA vs Emerson Hancock (Mariners) - 2-2, 5.19 ERA

This contest's pitching matchup is set, as the Diamondbacks will send Merrill Kelly (6-2) to the mound, while Emerson Hancock (2-2) will take the ball for the Mariners. Kelly and his team are 4-7-0 ATS this season when he starts. Kelly's team has been victorious in 66.7% of the games he's started as the moneyline favorite with a record of 4-2. The Mariners have gone 7-3-0 against the spread when Hancock starts. The Mariners have a 5-1 record in Hancock's six starts this season when they were the underdog on the moneyline.

Diamondbacks vs Mariners Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Diamondbacks win (58.4%)

Diamondbacks vs Mariners Moneyline

• Seattle is the underdog, +142 on the moneyline, while Arizona is a -168 favorite at home.

Diamondbacks vs Mariners Spread

• The Mariners are +1.5 on the run line against the Diamondbacks. The Mariners are -140 to cover, and the Diamondbacks are +116.

Diamondbacks vs Mariners Over/Under

• The over/under for Diamondbacks-Mariners on June 9 is 9. The over is -128, and the under is +104.

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

Diamondbacks vs Mariners Betting Trends

• The Diamondbacks have come away with 19 wins in the 40 contests they have been listed as the favorites in this season.
• This season Arizona has been victorious six times in 11 chances when named as a favorite of at least -168 on the moneyline.
• The Diamondbacks' games have gone over the total in 30 of their 62 opportunities.
• The Diamondbacks have posted a record of 28-34-0 against the spread this season.
• The Mariners have won 60% of the games this season they were the underdog on the moneyline (12-8).
• Seattle has gone 2-1 when playing as a moneyline underdog with odds of +142 or longer (66.7%).
• In the 63 games bookmakers have set an over/under for the Mariners, they have combined with opponents to go over the total 33 times (33-27-3).
• The Mariners have a 28-35-0 record ATS this season (covering 44.4% of the time).

Diamondbacks Player Leaders

• Corbin Carroll leads Arizona with 66 hits, batting .259 this season with 36 extra-base hits. He has an on-base percentage of .339 and a slugging percentage of .565.
• Among all qualifying hitters, he is 75th in batting average, his on-base percentage ranks 66th, and he is sixth in slugging.
• Geraldo Perdomo has 61 hits this season and a team-best OBP of .361. He's batting .266 and slugging .419.
• Among all qualified hitters, he ranks 62nd in batting average, 33rd in on-base percentage and 89th in slugging percentage.
• Josh Naylor has an OPS of .776, fueled by an OBP of .338 and a team-best slugging percentage of .438 this season.
• Eugenio Suarez has been key for Arizona with 55 hits, an OBP of .308 plus a slugging percentage of .517.
• Suarez enters this game on a two-game hitting streak. In his last five games he is hitting .250 with a double, two home runs, a walk and four RBIs.

Mariners Player Leaders

• Cal Raleigh has racked up 63 hits, a team-high for the Mariners. He's batting .272 and slugging .655 with an on-base percentage of .380.
• Including all qualifying players in the big leagues, his batting average puts him 53rd, his on-base percentage ranks 20th, and he is second in slugging.
• Raleigh hopes to build on a four-game hitting streak in this matchup. During his last five outings he is batting .350 with a double, three home runs, a walk and eight RBIs.
• Julio Rodriguez paces his team with a .412 slugging percentage. He has a batting average of .249 with an on-base percentage of .316.
• His batting average is 95th among all qualified players, his on-base percentage is 102nd, and he is 96th in slugging.
• J.P. Crawford has an on-base percentage of .394, a team-high for the Mariners.
• Jorge Polanco is batting .259 with seven doubles, 10 home runs and 10 walks.

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