September 20, 2025

Game Preview

Written by: Jake Turner

Jake is a veteran sports analyst with over 10 years of MLB prop betting experience.

Phillies vs Diamondbacks: Betting Preview & Props (Sep 20)

Last updated: September 20, 2025

Game Time: 9/20, 08:10PM

Game Preview

The Philadelphia Phillies are set to take on the Arizona Diamondbacks in what promises to be a compelling matchup. Both teams will rely heavily on their starting pitchers, Aaron Nola for the Phillies and Zac Gallen for the Diamondbacks, to gain an early advantage. Betting odds are currently not available for this game, but the pitcher duel is expected to be a key factor in determining the outcome.

Pitcher Breakdown

Pitching Matchup: Aaron Nola vs Zac Gallen

Aaron Nola (PHI):

Nola's pitch arsenal includes:

Four-Seam Fastball (30% usage, 91.8 mph)
Curveball (29% usage, 78.1 mph)
Sinker (18% usage, 90.6 mph)
Changeup (15% usage, 84.7 mph)
Cutter (8% usage, 86.2 mph)

Nola is a versatile pitcher, employing a mix of pitches to keep batters off balance. The Diamondbacks lineup averages .252 this season with a projected xBA of .253 against Nola's varied arsenal.

Zac Gallen (AZ):

Gallen's pitch selection features:

Four-Seam Fastball (46% usage, 93.5 mph)
Curveball (23% usage, 81.1 mph)
Changeup (15% usage, 86.3 mph)
Slider (7% usage, 88.0 mph)
Cutter (6% usage, 89.5 mph)
Sinker (3% usage, 93.3 mph)

Gallen is a power pitcher, leaning heavily on his fastball. The Phillies lineup averages .267 this season but projects to a .250 xBA against Gallen's high-velocity offerings.

Offensive Breakdown

Lineup Matchups & Batting Edges

Phillies vs Zac Gallen: The Phillies lineup averages .267 this season but is projected to hit .250 against Gallen's arsenal. Key performers include:

Harrison Bader: Season BA .287 → xBA vs arsenal .191 (−96 points), Season K% 27.1% → Arsenal K% 31.8% (+4.7%)
Max Kepler: Season BA .219 → xBA vs arsenal .246 (+27 points), Season K% 18.7% → Arsenal K% 21.1% (+2.4%)

Diamondbacks vs Aaron Nola: The Diamondbacks lineup averages .253 this season with a slight decrease to .253 xBA against Nola. Key performers include:

James McCann: Season BA .250 → xBA vs arsenal .279 (+29 points), Season K% 24.1% → Arsenal K% 19.5% (−4.6%)
Blaze Alexander: Season BA .240 → xBA vs arsenal .180 (−60 points), Season K% 31.5% → Arsenal K% 35.6% (+4.1%)

Strikeout Trends

Strikeout Risks & Rewards

The Phillies' projected K-rate is 23.8% vs Zac Gallen — up 3.7% from their 20.1% season average.
The Diamondbacks' projected K-rate is 22.1% vs Aaron Nola — up 0.5% from their 21.6% season average.

Umpire Influence

Behind the Plate: Umpire assignment has not been announced, which makes prop volatility a concern.

What to Bet On

📢 Prop Alert: James McCann (.250 → .279, +29 points) meets betting lean criteria!

No strikeout prop criteria met for pitchers based on current statistical data.

🔑 Key Takeaways

Aaron Nola and Zac Gallen present a fascinating pitcher matchup, impacting both teams' projected offensive outputs.
James McCann is a standout with a strong projected xBA against Nola's arsenal, making him a player to watch for prop bets.
Umpire assignment is pending, introducing potential volatility to prop bets.

🧠 FAQs

Q: Who is the best betting prop for the Phillies vs Diamondbacks game? A: James McCann meets our strict betting criteria with a notable increase in xBA against Aaron Nola.

Q: Is the umpire for this game pitcher-friendly? A: Umpire assignment is TBA, so tendencies are currently unknown.

Q: What time is the Phillies vs Diamondbacks game? A: The game is scheduled for 9/20, 08:10PM.

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