Player Prop Bets for D-Backs vs Royals - September 9th, 2026

-120O/U: 8.5
(-120/+100)+100

Zac Gallen – Over/Under 2.5 Strikeouts (+115/-145)
Despite conventional wisdom, fastballs are generally a pitcher’s least effective pitch. Zac Gallen has gone to his secondary offerings 5.2% more often this season (57.7%) than he did last year (52.5%).
Explain: A pitcher who limits has fastball usage will instead heavily use change-ups, curveballs, sliders, etc. These are far more effective pitches at preventing runs and generating strikeouts.
Nolan Arenado – Over/Under 0.5 Hits (-225/+170)
Nolan Arenado has primarily hit in the back-half of the lineup this season (51% of the time), but he is projected to hit 4th on the lineup card today.
Explain: The higher in the order a player bats, the more plate appearances he will get and the more opportunities he will get to hit the Over for every market. A player who hits higher in the order than he normally does may provide extra value opportunity since the market may be based on him hitting lower.
Arizona Diamondbacks hitters as a unit place 25th- in the majors for power this year when assessing with their 7.2% Barrel%.
Explain: Barrel% measures how often a player hits the ball at the optimal exit velocity and launch angle and is a terrific measure of underlying power.

Kansas City Royals – Moneyline (+100)
Among all the teams playing today, the best infield defense is that of the Kansas City Royals.
Explain: Defense is an integral part of preventing hits and runs.
Kyle Isbel – Over/Under 0.5 Total Bases (-155/+120)
Kyle Isbel has a good chance to have an edge against every reliever from start to finish, since the bullpen of the Arizona Diamondbacks has just 1 same-handed RP.
Explain: Hitters perform worse against pitchers of the same handedness (i.e. righty-vs-righty), and being able to avoid those matchups against the bullpen boosts performance and creates hidden edge.
Michael Massey – Over/Under 1.5 Total Bases (+135/-175)
In today’s matchup, Michael Massey is at a disadvantage facing the league’s deepest RF fences given that he hits his flyballs to the pull field at a 38.3% rate (94th percentile).
Explain: This player’s skill set does not match up particularly well with the park he’s in today, which may lead to worse-than-usual performance.

Kansas City Royals – Run Line +1.5 (-160)
The Kansas City Royals have hit the Run Line in 18 of their last 30 games (+5.95 Units / 15% ROI)
Over/Under 8.5 Game Total (-120/+100)
The Arizona Diamondbacks have hit the Game Total Under in 22 of their last 35 away games (+7.95 Units / 21% ROI)
Nick Loftin – Over/Under 0.5 Home Runs (+1000/-3000)
Nick Loftin has hit the Home Runs Over in 2 of his last 7 games at home (+13.00 Units / 186% ROI)

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