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

Odds updated as of 9:11 p.m.

MLB action on Monday includes the Arizona Diamondbacks playing the Seattle Mariners.

We've got you covered, in terms of the vital info about this game before you take a look at the 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: (-174) | SEA: (+146)
• Spread: ARI: -1.5 (+114) | SEA: +1.5 (-137)
• Total: 9 -- Over: (-118) | 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

The Diamondbacks will call on Merrill Kelly (6-2) versus the Mariners and Emerson Hancock (2-2). Kelly's team is 4-7-0 against the spread in his starts this season. Kelly's team is 4-2 this season when he starts and they are the moneyline favorite. The Mariners have a 7-3-0 ATS record in Hancock's 10 starts that had a set spread. The Mariners are 5-1 in Hancock's six starts this season that 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 (59.4%)

Diamondbacks vs Mariners Moneyline

• Seattle is the underdog, +146 on the moneyline, while Arizona is a -174 favorite at home.

Diamondbacks vs Mariners Spread

• The Mariners are at the Diamondbacks, and are +1.5 on the runline. The Mariners are +114 to cover the spread, and the Diamondbacks are -137.

Diamondbacks vs Mariners Over/Under

• Diamondbacks versus Mariners on June 9 has an over/under of 9 runs, with the odds on the over -118 and the under set at -104.

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

Diamondbacks vs Mariners Betting Trends

• The Diamondbacks have been favorites in 40 games this season and have come away with the win 19 times (47.5%) in those contests.
• This season Arizona has come away with a win six times in 11 chances when named as a favorite of at least -174 on the moneyline.
• The Diamondbacks and their opponents have gone over in 30 of their 62 games with a total set by sportsbooks this season.
• The Diamondbacks have an against the spread mark of 28-34-0 in 62 games with a line this season.
• The Mariners have compiled a 12-8 record in games they were the underdog on the moneyline (winning 60% of those games).
• Seattle is 2-1 (winning 66.7% of its games) when playing as a moneyline underdog of +146 or longer.
• The Mariners have had an over/under set by bookmakers 63 times, and have combined with opponents to go over the total in 33 of those games (33-27-3).
• The Mariners have a 28-35-0 record against the spread this season (covering 44.4% of the time).

Diamondbacks Player Leaders

• Corbin Carroll has 66 hits, which leads Arizona hitters this season, while batting .259 with 36 extra-base hits. He has an on-base percentage of .339 and a slugging percentage of .565.
• Among the qualifying hitters in baseball, his batting average ranks 75th, 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.
• His batting average ranks 62nd among qualified players, his on-base percentage 33rd, and his slugging percentage 89th.
• 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 18 home runs, 48 RBI and a batting average of .233 this season.
• Suarez has hit safely in two straight games. During his last five outings he is batting .250 with a double, two home runs, a walk and four RBIs.

Mariners Player Leaders

• Cal Raleigh has totaled 63 hits, a team-best for the Mariners. He's batting .272 and slugging .655 with an on-base percentage of .380.
• Including all qualified hitters in MLB, he is 53rd in batting average, 20th in on-base percentage and second in slugging percentage.
• Raleigh heads into this game on a four-game hitting streak. During his last five outings he is hitting .350 with a double, three home runs, a walk and eight RBIs.
• Julio Rodriguez's .412 slugging percentage paces his team. He has a batting average of .249 with an on-base percentage of .316.
• Including all qualifying hitters, he is 95th in batting average, 102nd in on-base percentage and 96th in slugging percentage.
• J.P. Crawford a has .394 on-base percentage to lead the Mariners.
• Jorge Polanco has seven doubles, 10 home runs and 10 walks while batting .259.

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