Diamondbacks vs Royals Prediction, Odds, Moneyline, Spread & Over/Under for Sept. 8

Odds updated as of 7:12 p.m.

MLB action on Tuesday includes the Kansas City Royals taking on the Arizona Diamondbacks.

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

Royals vs Diamondbacks Game Info

• Kansas City Royals (64-81) vs. Arizona Diamondbacks (77-68)
• Date: Tuesday, September 8, 2026
• Time: 7:40 p.m. ET
• Venue: Kauffman Stadium -- Kansas City, Missouri
• Coverage: Royals.TV and Dbacks.TV

Royals vs Diamondbacks Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: KC: (-108) | ARI: (-108)
• Spread: KC: +1.5 (-178) | ARI: -1.5 (+146)
• Total: 9.5 -- Over: (+104) | Under: (-128)

Royals vs Diamondbacks Probable Starting Pitchers

Probable Pitchers: Michael Wacha (Royals) - 9-8, 3.36 ERA vs Corbin Burnes (Diamondbacks) - 0-0, 0.00 ERA

The Royals will call on Michael Wacha (9-8) versus the Diamondbacks and Corbin Burnes. Wacha's team is 15-11-0 against the spread in his starts this season. Wacha's team has won 66.7% of his starts when they are favored on the moneyline (6-3). Last season Burnes and his team finished 4-7-0 against the spread in games he pitched. Burnes' team was the underdog on the moneyline only one time in a game he pitched a season ago, and lost.

Royals vs Diamondbacks Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Royals win (52.8%)

Royals vs Diamondbacks Moneyline

• Arizona is a -108 underdog on the moneyline, while Kansas City is a -108 favorite at home.

Royals vs Diamondbacks Spread

Royals vs Diamondbacks Over/Under

• A total of 9.5 runs has been set for the Royals-Diamondbacks game on Sept. 8, with the over available at +104 and the under at -128.

Bet on Kansas City Royals vs. Arizona Diamondbacks on FanDuel today!

Royals vs Diamondbacks Betting Trends

• The Royals have been victorious in 26, or 55.3%, of the 47 contests they have been chosen as favorites in this season.
• This season Kansas City has come away with a win 26 times in 48 chances when named as a favorite of at least -108 on the moneyline.
• The Royals and their opponents have gone over the total this season in 65 of their 140 opportunities.
• The Royals are 73-67-0 against the spread in their 140 games that had a posted line this season.
• The Diamondbacks have been the underdog on the moneyline 81 total times this season. They've finished 38-43 in those games.
• Arizona has gone 38-44 when it has played as a moneyline underdog with odds of -108 or longer (46.3%).
• The Diamondbacks have played in 144 games with a set over/under, and have combined with their opponents to go over the total 61 times (61-79-4).
• The Diamondbacks have put together a 76-68-0 record ATS this season (covering 52.8% of the time).

Royals Player Leaders

• Bobby Witt Jr. leads Kansas City with an OBP of .360, plus a team-best slugging percentage of .451. He's batting .283 on the season.
• Among qualified hitters in MLB, his batting average ranks 16th, his on-base percentage ranks 30th, and he is 46th in slugging.
• Jac Caglianone has 134 hits, which ranks first among Kansas City batters this season. He's batting .283 with 52 extra-base hits. He's also slugging .494 with an on-base percentage of .331.
• He ranks 16th in batting average, 69th in on-base percentage and 16th in slugging in the major leagues.
• Carter Jensen has collected 108 base hits, an OBP of .316 and a slugging percentage of .440 this season.
• Salvador Perez has been key for Kansas City with 120 hits, an OBP of .274 plus a slugging percentage of .387.
• Perez has safely hit in six straight games. In his last 10 outings he is hitting .341 with four doubles, two home runs, a walk and 12 RBIs.

Diamondbacks Player Leaders

• Corbin Carroll has a .466 slugging percentage, which leads the Diamondbacks. He's batting .240 with an on-base percentage of .334.
• Including all qualified hitters in MLB, his batting average puts him 101st, his on-base percentage is 66th, and he is 36th in slugging.
• Geraldo Perdomo's .365 slugging percentage paces his team. He has a batting average of .251 with an on-base percentage of .359.
• He is currently 76th in batting average, 32nd in on-base percentage and 123rd in slugging percentage among all qualifying hitters.
• Ketel Marte is hitting .251 with 24 doubles, three triples, 22 home runs and 44 walks.
• Gabriel Moreno has collected 124 hits with a .379 on-base percentage to lead his team in both.

Royals vs Diamondbacks Head to Head

• 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)
• 4/24/2023: 5-4 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 10, Favorite Moneyline: -156, Underdog Moneyline: +132)

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