MLB Prop Bets: Kansas City Royals vs Arizona Diamondbacks (September 9, 2026)
The Arizona Diamondbacks (78-68) face the Kansas City Royals (64-82) at Kauffman Stadium on Wednesday at 7:40pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Zac Gallen is the probable pitcher for the Diamondbacks, while Daniel Lynch is the probable pitcher for the Royals. The Diamondbacks are favored to win at -115, while the Royals are at -105. The total runs line is set at 8.5, with OVER at -120 and UNDER at +100.
- The Diamondbacks (+144) have an 82-64 Run Line record this season, while the Royals (-175) hold a record of 73-73.
- The Diamondbacks have a 59-78-9 O/U record this season (meaning 59 games have gone over the total runs line, 78 have gone under and nine have resulted in a push). The Royals have a 66-74-6 O/U record.
Scoring Insights
- The Diamondbacks are averaging 4.4 runs per game this season (17th in the league). Comparatively, the Royals are averaging 4.3 (21st).
- In the field, the Diamondbacks are allowing 4.4 runs per game this season (T13th in the league), while the Royals are allowing an average of 4.9 runs (25th).
Let's take a look at how these teams perform in some other key statistical areas.
Batting Insights:
Batting Average
- Looking at their batting averages this season, the Diamondbacks are at .242 (ranking 18th in the Major leagues), while the Royals are batting .247 (12th).
Home Runs
- In terms of total home runs this season, the Royals have hit 152 (23rd in the Major Leagues). Meanwhile, the Diamondbacks have managed 142 (26th).
Runs Batted In
- Finally, looking at their runs batted in, the Diamondbacks have recorded 616 RBIs to rank 17th in the MLB this season. Comparatively, the Royals have recorded 595 RBIs to rank 21st.
Pitching Insights:
Earned Run Average
- The Royals have an earned run average of 4.67 this season (27th in the Majors), while The Diamondbacks have an ERA of 4.09 (13th).
Strikeouts
- Turning our attention to total strikeouts, the Diamondbacks have recorded 1007 this season, ranking 29th in the MLB. Meanwhile, the Royals rank 28th for total strikeouts, recording 1059.
Opponent Batting Average
- Opponents are batting an average of .258 against the Royals this season (28th in the Major Leagues). Comparatively, the Diamondbacks' opponents are at .248 (20th).
First Innings Moneyline
- Here are their first innings moneyline records in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Diamondbacks | 30-40-76 | 18-15-37 | 12-25-37 | 17-13-29 | 13-27-47 | 0-0-2 | 0-3-7 |
| Royals | 33-36-77 | 19-19-36 | 14-17-41 | 10-14-29 | 23-22-48 | 0-0-0 | 2-3-5 |
Lead After Three Innings
- Here are their records after the first three innings in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Diamondbacks | 44-68-34 | 27-25-18 | 16-42-16 | 25-19-15 | 19-49-19 | 1-1-0 | 1-4-5 |
| Royals | 46-65-35 | 28-30-16 | 18-35-19 | 15-25-13 | 31-40-22 | 0-0-0 | 2-5-3 |
NRFI/YRFI
The NRFI market is paying -110 and the YRFI is paying -120.
- The NRFI is 67-79 in Diamondbacks games this season. The Royals have a 72-74 NRFI record.
Last Time They Met
The Diamondbacks recorded a 5-3 extra innings victory over the Royals at Kauffman Stadium yesterday. Tim Tawa dominated at the plate in that matchup, notching 1 home run, 2 singles and 2 RBIs. The Diamondbacks have now won four straight at Kauffman Stadium against the Royals.
