Diamondbacks vs Phillies Prediction, Odds, Moneyline, Spread & Over/Under for Sept. 20

Odds updated as of 6:12 a.m.

The MLB's Saturday schedule includes the Arizona Diamondbacks taking on the Philadelphia Phillies.

Before you do any MLB betting on this matchup at FanDuel Sportsbook, here's everything you need to know.

Diamondbacks vs Phillies Game Info

• Arizona Diamondbacks (77-77) vs. Philadelphia Phillies (92-62)
• Date: Saturday, September 20, 2025
• Time: 8:10 p.m. ET
• Venue: Chase Field -- Phoenix, Arizona
• Coverage: ARID and NBCS-PH

Diamondbacks vs Phillies Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: ARI: (-112) | PHI: (-104)
• Spread: ARI: +1.5 (-178) | PHI: -1.5 (+146)
• Total: 9 -- Over: (-110) | Under: (-110)

Diamondbacks vs Phillies Probable Starting Pitchers

Probable Pitchers: Zac Gallen (Diamondbacks) - 12-14, 4.73 ERA vs Aaron Nola (Phillies) - 4-9, 6.44 ERA

The probable pitchers are Zac Gallen (12-14) for the Diamondbacks and Aaron Nola (4-9) for the Phillies. Gallen and his team have a record of 14-17-0 against the spread when he starts. Gallen's team has won 44.4% of his starts when they are favored on the moneyline (8-10). The Phillies are 7-8-0 against the spread when Nola starts. The Phillies have a 2-2 record in Nola's four starts this season when they were the moneyline underdog.

Diamondbacks vs Phillies Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Diamondbacks win (53.5%)

Diamondbacks vs Phillies Moneyline

• Looking at the moneyline for Phillies-Diamondbacks, Philadelphia is the underdog at -104, and Arizona is -112 playing at home.

Diamondbacks vs Phillies Spread

• The Phillies are 1.5-run favorites against the spread for this matchup with the Diamondbacks. The Phillies are +146 to cover, while the Diamondbacks are -178 to cover as a 1.5-run underdog on the runline.

Diamondbacks vs Phillies Over/Under

• The over/under for the Diamondbacks versus Phillies contest on Sept. 20 has been set at 9, with -110 odds on the over and -110 odds on the under.

Bet on Arizona Diamondbacks vs. Philadelphia Phillies on FanDuel today!

Diamondbacks vs Phillies Betting Trends

• The Diamondbacks have been favorites in 84 games this season and have come away with the win 44 times (52.4%) in those contests.
• This season Arizona has come away with a win 41 times in 81 chances when named as a favorite of at least -112 on the moneyline.
• The Diamondbacks and their opponents have gone over in 75 of their 150 games with a total set by sportsbooks this season.
• The Diamondbacks are 74-76-0 against the spread in their 150 games that had a posted line this season.
• The Phillies are 14-15 in games they were the underdog on the moneyline (winning 48.3% of those games).
• When it has played as a moneyline underdog with odds of -104 or longer, Philadelphia has a record of 14-13 (51.9%).
• In the 147 games bookmakers have set an over/under for the Phillies, they have combined with opponents to go over the total 62 times (62-76-9).
• The Phillies have put together a 77-70-0 record ATS this season (covering 52.4% of the time).

Diamondbacks Player Leaders

• Geraldo Perdomo has an OPS of .852, fueled by an OBP of .391 to go with a slugging percentage of .461. He has a .289 batting average, as well.
• Among qualifying batters, he ranks 13th in batting average, his on-base percentage ranks fifth, and he is 49th in slugging.
• Perdomo will look for his 10th straight game with a hit in this matchup. During his last 10 outings he is hitting .361 with three doubles, a triple, two home runs, eight walks and six RBIs.
• Corbin Carroll leads Arizona in total hits (140) this season while batting .259 with 77 extra-base hits. He's slugging .543 with an on-base percentage of .340.
• He is 69th in batting average, 52nd in on-base percentage and seventh in slugging in the major leagues.
• Carroll enters this game looking to extend his five-game hit streak. In his last five games he is batting .368 with a double, a triple, three walks and two RBIs.
• Ketel Marte has 126 hits this season and has a slash line of .279/.375/.508.
• Gabriel Moreno is batting .285 with a .351 OBP and 37 RBI for Arizona this season.

Phillies Player Leaders

• Kyle Schwarber has racked up an on-base percentage of .369 and has 138 hits, both team-best numbers for the Phillies. He's batting .241 and slugging .563.
• Including all the qualifying hitters in the majors, he ranks 110th in batting average, 12th in on-base percentage and fourth in slugging percentage.
• Bryce Harper is batting .266 with 32 doubles, 27 home runs and 68 walks. He's slugging .502 with an on-base percentage of .362.
• Including all qualifying hitters, he is 48th in batting average, 15th in on-base percentage and 16th in slugging percentage.
• Bryson Stott has 20 doubles, three triples, 12 home runs and 52 walks while batting .254.
• Nick Castellanos has 27 doubles, two triples, 17 home runs and 31 walks while batting .255.

Diamondbacks vs Phillies Head to Head

• 9/19/2025: 8-2 PHI (Favorite: Diamondbacks, Spread: -1.5, Total: 9, Favorite Moneyline: -124, Underdog Moneyline: +106)
• 5/4/2025: 11-9 ARI (Favorite: Phillies, Spread: -1.5, Total: 9, Favorite Moneyline: -148, Underdog Moneyline: +126)
• 5/3/2025: 7-2 PHI (Favorite: Phillies, Spread: -1.5, Total: 9.5, Favorite Moneyline: -124, Underdog Moneyline: +106)
• 5/2/2025: 3-2 PHI (Favorite: Phillies, Spread: -1.5, Total: 9.5, Favorite Moneyline: -152, Underdog Moneyline: +128)
• 8/11/2024: 12-5 ARI (Favorite: Phillies, Spread: -1.5, Total: 8.5, Favorite Moneyline: -134, Underdog Moneyline: +114)
• 8/10/2024: 11-1 ARI (Favorite: Diamondbacks, Spread: -1.5, Total: 8.5, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 8/9/2024: 3-2 ARI (Favorite: Phillies, Spread: -1.5, Total: 8.5, Favorite Moneyline: -134, Underdog Moneyline: +114)
• 8/8/2024: 6-4 PHI (Favorite: Diamondbacks, Spread: -1.5, Total: 10.5, Favorite Moneyline: -130, Underdog Moneyline: +110)
• 6/23/2024: 4-1 PHI (Favorite: Phillies, Spread: -1.5, Total: 9.5, Favorite Moneyline: -245, Underdog Moneyline: +200)
• 6/22/2024: 12-1 PHI (Favorite: Phillies, Spread: -1.5, Total: 9.5, Favorite Moneyline: -270, Underdog Moneyline: +220)

Sign up for FanDuel Sportsbook and FanDuel Daily Fantasy today!