Diamondbacks vs Royals Prediction, Odds, Moneyline, Spread & Over/Under for Sept. 9

Odds updated as of 2:12 a.m.

Wednesday's slate in the MLB includes a matchup between the Arizona Diamondbacks and the Kansas City Royals.

All the info you need to make smart wagers on this matchup at FanDuel Sportsbook can be found below. Check out all of the latest MLB betting lines here.

Diamondbacks vs Royals Game Info

• Arizona Diamondbacks (78-68) vs. Kansas City Royals (64-82)
• Date: Wednesday, September 9, 2026
• Time: 7:40 p.m. ET
• Venue: Kauffman Stadium -- Kansas City, Missouri
• Coverage: Royals.TV and Dbacks.TV

Diamondbacks vs Royals Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: ARI: (-112) | KC: (-104)
• Spread: ARI: -1.5 (+146) | KC: +1.5 (-178)
• Total: 8.5 -- Over: (-122) | Under: (+100)

Diamondbacks vs Royals Probable Starting Pitchers

Probable Pitchers: Zac Gallen (Diamondbacks) - 3-9, 6.34 ERA vs Daniel Lynch (Royals) - 4-5, 3.51 ERA

The Diamondbacks will give the nod to Zac Gallen (3-9) versus the Royals and Daniel Lynch (4-5). Gallen's team is 8-11-0 against the spread in his starts this season. When Gallen starts a game and his team is the favorite on the moneyline, they have a record of 4-4. The Royals have a 2-4-0 record against the spread in Lynch's starts. The Royals are 2-2 in Lynch's four starts this season that they were the moneyline underdog.

Diamondbacks vs Royals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Royals win (56.6%)

Diamondbacks vs Royals Moneyline

• The moneyline numbers for Diamondbacks vs. Royals reveal Arizona as the favorite (-112) and Kansas City as the underdog (-104) despite being the home team.

Diamondbacks vs Royals Spread

• The Diamondbacks are at the Royals and are favored by 1.5 runs on the spread. The Diamondbacks are +146 to cover the runline, with the Royals being -178.

Diamondbacks vs Royals Over/Under

• A combined run total of 8.5 has been set for Diamondbacks-Royals on Sept. 9, with the over at -122 and the under at +100.

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Diamondbacks vs Royals Betting Trends

• The Diamondbacks have been victorious in 34, or 58.6%, of the 58 contests they have been chosen as favorites in this season.
• This year Arizona has won 33 of 56 games when listed as at least -112 on the moneyline.
• The Diamondbacks and their opponents have hit the over in 61 of their 145 games with a total set by oddsmakers this season.
• The Diamondbacks have posted a record of 77-68-0 against the spread this season.
• The Royals have put together a 36-54 record in games they were listed as the moneyline underdog (winning 40% of those games).
• Kansas City is 34-51 (winning 40% of its games) when it has played as a moneyline underdog of -104 or longer.
• The Royals have combined with opponents to go over the total 65 times this season for a 65-73-3 record against the over/under.
• The Royals have a 73-68-0 record ATS this season (covering 51.8% of the time).

Diamondbacks Player Leaders

• Corbin Carroll has 126 hits to go with a slugging percentage of .466, both of which are tops among Arizona hitters this season. He has a .240 batting average and an on-base percentage of .334.
• Among qualifying batters, he is 100th in batting average, his on-base percentage ranks 66th, and he is 36th in slugging.
• Geraldo Perdomo leads Arizona in slugging percentage (.364) thanks to 33 extra-base hits. He's batting .250 with an on-base percentage of .358.
• Among all qualifying players, he is 76th in batting average, 33rd in on-base percentage and 124th in slugging percentage.
• Ketel Marte has 124 hits this season and has a slash line of .251/.319/.445.
• Marte has logged a hit or more in seven games in a row. During his last 10 outings he is hitting .281 with a double, a home run, eight walks and three RBIs.
• Gabriel Moreno leads Arizona with an OBP of .378 this season while batting .300 with 54 walks and 60 runs scored.
• Moreno enters this matchup on a five-game hitting streak. In his last five games he is hitting .333 with two doubles, a home run, three walks and three RBIs.

Royals Player Leaders

• Bobby Witt Jr. has racked up a team-best OBP (.359) and slugging percentage (.448). He's batting .280.
• Including all the qualified hitters in MLB, his batting average is 25th, his on-base percentage ranks 31st, and he is 47th in slugging.
• Jac Caglianone has collected 134 hits to lead his team. He has a batting average of .283 while slugging .494 with an on-base percentage of .331.
• Including all qualifying players, he ranks 17th in batting average, 68th in on-base percentage and 16th in slugging percentage.
• Carter Jensen has 29 doubles, two triples, 22 home runs and 61 walks while hitting .228.
• Salvador Perez has 23 doubles, a triple, 19 home runs and 22 walks while hitting .230.

Diamondbacks vs Royals Head to Head

• 9/8/2026: 5-3 ARI (Favorite: Royals, Spread: -1.5, Total: 9.5, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 9/7/2026: 5-4 ARI (Favorite: Royals, Spread: -1.5, Total: 9.5, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 7/6/2025: 4-0 KC (Favorite: Diamondbacks, Spread: -1.5, Total: 10, Favorite Moneyline: -156, Underdog Moneyline: +132)
• 7/5/2025: 7-1 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 9, Favorite Moneyline: -132, Underdog Moneyline: +112)
• 7/4/2025: 9-3 KC (Favorite: Diamondbacks, Spread: -1.5, Total: 8.5, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 7/24/2024: 8-6 ARI (Favorite: Royals, Spread: -1.5, Total: 9, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 7/23/2024: 6-2 ARI (Favorite: Royals, Spread: -1.5, Total: 9, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 7/22/2024: 10-4 KC (Favorite: Royals, Spread: -1.5, Total: 8.5, Favorite Moneyline: -156, Underdog Moneyline: +132)
• 4/26/2023: 2-0 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 8.5, Favorite Moneyline: -290, Underdog Moneyline: +235)
• 4/25/2023: 5-4 KC (Favorite: Diamondbacks, Spread: -1.5, Total: 9.5, Favorite Moneyline: -142, Underdog Moneyline: +120)

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