Invisible Insider
July 26, 2025
Game Preview
Diamondbacks at Pirates MLB Betting Preview

Game Time: 7/26, 06:40 PM

1. Brief Intro

It's a crucial matchup as the Arizona Diamondbacks take on the Pittsburgh Pirates. Arizona enters as the -137 favorite, while Pittsburgh stands as a +113 underdog. With 79% of the betting money backing the Diamondbacks, this game promises intriguing dynamics for bettors.

2. Pitcher Breakdown

Pitching Matchup: Merrill Kelly vs. Andrew Heaney
Merrill Kelly (AZ):

Kelly's arsenal is diverse, featuring a Changeup (26% usage, 88.4 mph), Four-Seam Fastball (25% usage, 92.0 mph), Cutter (21% usage, 90.8 mph), Sinker (13% usage, 92.4 mph), Curveball (9% usage, 81.9 mph), and Slider (7% usage, 85.9 mph). He's a pitch-mix artist, utilizing various speeds and movements. This season, the Pirates lineup averages .251 against right-handers with a projected xBA of .260 against Kelly's offerings.

Andrew Heaney (PIT):

Heaney's pitching repertoire includes a Four-Seam Fastball (45% usage, 90.1 mph), Changeup (17% usage, 81.9 mph), Slider (15% usage, 80.4 mph), Curveball (12% usage, 75.3 mph), and Sinker (11% usage, 89.2 mph). He leans heavily on his fastball, complemented by off-speed pitches. The Diamondbacks lineup averages .254 against lefties with a projected xBA of .259 against Heaney's arsenal.

3. Lineup Advantage vs. Arsenal

Lineup Matchups & Batting Edges
For Away Team vs. Home Pitcher:

The Diamondbacks lineup averages .254 this season but projects to .259 against Heaney's arsenal. Randal Grichuk shows the biggest boost: .243 season BA → .289 xBA (+46 points), though not meeting our lean threshold. Eugenio Suárez has the most significant decrease: .250 season BA → .237 xBA (-13 points), with an increased strikeout risk (22.5% → 28.9%, +6.4%).

For Home Team vs. Away Pitcher:

The Pirates lineup averages .251 this season, projecting to .260 against Kelly's arsenal. Nick Gonzales has the biggest increase: .258 season BA → .325 xBA (+67 points), meeting our lean criteria. Oneil Cruz shows the largest decrease: .276 season BA → .223 xBA (-53 points), with a slight increase in strikeouts (24.4% → 27.1%, +2.7%).

4. Lineup Strikeout Trends vs. Arsenal

Strikeout Risks & Rewards

The Diamondbacks' projected K-rate is 20.4% vs. Heaney — up 0.5% from their 19.9% season average. The Pirates' projected K-rate is 21.3% vs. Kelly — down 1.0% from their 22.3% season average. The slight increase for Arizona could indicate potential K prop value.

5. Umpire Influence

Behind the Plate: TBA

Umpire assignment has not been announced, which makes prop volatility a concern.

6. Betting Interpretation / Final Lean

Final Lean & Betting Takeaway

STEP-BY-STEP BETTING ANALYSIS:

STEP 1: Check ALL individual batters for prop opportunities
No Arizona batters meet our criteria for a lean (xBA > 0.300 AND boost > +20 points). On the Pittsburgh side, Nick Gonzales (.258 → .325, +67 points) exceeds our thresholds, suggesting a potential batting lean.

STEP 2: Check team strikeout rates for pitcher props
The Diamondbacks' increase in K-rate does not meet our lean criteria. The Pirates' reduction in K-rate also falls short for an under lean.

STEP 3: Report findings
Our final lean would be on Nick Gonzales - his .325 xBA against Kelly's arsenal is well above our .300 threshold with a significant +67 point boost. No significant statistical edges meet our pitching prop betting threshold in this matchup.

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