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July 27, 2025
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Diamondbacks at Pirates MLB Betting Preview

Game Time: 7/27, 01:35 PM

1. Brief Intro

As the Arizona Diamondbacks face off against the Pittsburgh Pirates, bettors eye the pitching duel and lineup matchups that could sway the game's outcome. DraftKings lists the Pirates as a -163 favorite and the Diamondbacks as a +133 underdog, with 70% of the money backing the Pirates. This betting line suggests confidence in the Pirates' chances, but let's dig deeper into the stats for a clearer picture.

2. Pitcher Breakdown

Pitching Matchup: Zac Gallen vs. Paul Skenes
Zac Gallen (AZ):

Zac Gallen brings a diverse arsenal to the mound, featuring a Four-Seam Fastball (47% usage, 93.3 mph), Curveball (24% usage, 81.0 mph), Changeup (14% usage, 86.8 mph), Slider (7% usage, 87.6 mph), Cutter (7% usage, 89.3 mph), and Sinker (1% usage, 93.0 mph). Gallen’s pitch mix highlights his ability to keep hitters off balance, but the Pirates lineup has a projected xBA of .237 against his repertoire, suggesting they might not be severely challenged.

Paul Skenes (PIT):

Paul Skenes is a power pitcher with a Four-Seam Fastball (39% usage, 98.2 mph) leading his arsenal, complemented by a Splitter (18% usage, 93.6 mph), Sweeper (15% usage, 84.5 mph), Changeup (9% usage, 88.2 mph), Sinker (8% usage, 97.7 mph), Slider (7% usage, 85.1 mph), and Curveball (4% usage, 83.4 mph). Skenes' high velocity and pitch variety could be problematic for the Diamondbacks, who average .246 against his arsenal, slightly below their season average.

3. Lineup Advantage vs. Arsenal

Lineup Matchups & Batting Edges
For AZ vs. Paul Skenes:

The Diamondbacks lineup averages .252 this season but projects to .246 against Skenes' arsenal. Jake McCarthy stands out with a notable increase, moving from a season BA of .144 to an xBA of .224 (+80 points), indicating potential upside. Conversely, Jose Herrera shows the biggest decrease, dropping from .312 to .225 (-87 points), a substantial decline against Skenes.

For PIT vs. Zac Gallen:

The Pirates average .248 this season and project a .237 xBA against Gallen, a slight dip. Bryan Reynolds sees the biggest boost, climbing from a season BA of .231 to an xBA of .274 (+43 points). On the downside, Oneil Cruz drops from .285 to .230 (-55 points), signaling a tough matchup against Gallen's pitches.

4. Lineup Strikeout Trends vs. Arsenal

Strikeout Risks & Rewards

The Diamondbacks' projected K-rate is 20.9% against Skenes — up 4.1% from their 16.8% season average, suggesting a potential opportunity for strikeout props. Meanwhile, the Pirates' projected K-rate is 26.2% against Gallen — up 3.9% from their 22.2% season average, indicating a possible increase in strikeouts.

5. Umpire Influence

Behind the Plate: TBA

Umpire assignment has not been announced, which makes prop volatility a concern. Without exact umpire tendencies, bettors should be cautious about strikeout and walk props.

6. Betting Interpretation / Final Lean

Final Lean & Betting Takeaway

STEP-BY-STEP BETTING ANALYSIS:

STEP 1: Check ALL individual batters for prop opportunities
Evaluating all key performers, no Arizona batter meets the criteria of an xBA > 0.300 with a boost > +20 points. Similarly, no Pittsburgh batter fits the criteria for a betting lean.

STEP 2: Check team strikeout rates for pitcher props
The Diamondbacks' projected K-rate against Skenes is 20.9%, which does not meet the threshold for an OVER lean. The Pirates' projected 26.2% K-rate against Gallen is close but not quite 4% over their season average.

STEP 3: Report findings
No significant statistical edges meet our betting threshold in this matchup. While individual performances may vary, strict criteria for betting leans are unmet, suggesting a careful approach is warranted for this game.

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