The Arizona Diamondbacks will host the Philadelphia Phillies in the MLB tonight. First pitch from Chase Field is scheduled for 9:40 p.m. ET. The game will be broadcast on ARID.
The Phillies are listed as -116 favorites on the moneyline and -1.5 (+140) on the run line. The Diamondbacks are priced at +106 on the moneyline and +1.5 (-170) on the run line. The total is set at over/under 8.5 runs.
Let's get into my MLB picks and Phillies vs Diamondbacks predictions for Monday, August 31, as well as probable pitchers, the weather report, and more.
Phillies vs Diamondbacks Prediction
- Phillies vs Diamondbacks Pick: Over 8.5 Runs (-105)
My Phillies vs Diamondbacks best bet is on the total to go over 8.5 runs. Make sure to find the best odds by checking our live MLB odds page.
Phillies vs Diamondbacks Odds
| Phillies Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
-1.5 +140 | 8.5 -105o / -115u | -116 |
| Diamondbacks Odds | ||
|---|---|---|
| Spread | Total | Moneyline |
+1.5 -170 | 8.5 -105o / -115u | +106 |
- Phillies vs Diamondbacks moneyline: Phillies -116, Diamondbacks +106
- Phillies vs Diamondbacks over/under: 8.5 (-105o / -115u)
- Phillies vs Diamondbacks spread: Phillies -1.5 (+140), Diamondbacks +1.5 (-170)
Phillies vs Diamondbacks Probable Pitchers
| Aaron Nola (RHP, PHI) | Stat | Brandon Pfaadt (RHP, ARI) |
|---|---|---|
| 5-10 | W-L | 7-1 |
| 1.0 | fWAR (FanGraphs) | 1.4 |
| 5.03 / 4.17 | ERA / xERA | 3.51 / 3.75 |
| 4.90 / 3.75 | FIP / xFIP | 4.08 / 4.33 |
| 16.9% | K-BB% | 10.7% |
| 40.1% | GB% | 46.6% |
| .312 | BABIP | .259 |
| 104 | Stuff+ | 94 |
| 103 | Location+ | 1o4 |
Phillies vs Diamondbacks MLB Betting Preview
Philadelphia Phillies Betting Preview
The Philadelphia Phillies bring a red-hot lineup into Phoenix tonight, having scored five or more runs in 11 of their last 17 games, and they own an impressive record of 13-2 in their last 15 games.
Their offensive momentum will be put to the test as right-hander Aaron Nola takes the mound looking to sustain a recent resurgence.
On paper, Nola’s overall season numbers reflect a tough campaign: he sits at 5-10 with a 5.03 ERA and a 4.90 FIP across 27 starts. However, his underlying indicators—specifically a 4.17 xERA and a 3.75 xFIP—suggest he has suffered from some poor luck, backed up by an inflated .312 BABIP.
Nola's recent form hints at a turnaround that seemingly began with a strong outing at the Field of Dreams game. Over his last three starts, Nola has surrendered just four runs across 18.0 innings, compiling a crisp 2.00 ERA.
His primary metrics remain solid, featuring a 16.9% K-BB% rate, a 104 Stuff+, and a 103 Location+. However, it is worth noting that his recent dominant stretch came against manageable competition in the Twins, Marlins, and Mariners.
Facing a far more aggressive Diamondbacks lineup in a hitter-friendly environment presents a much tougher assignment, leaving room for run production on both sides.
Arizona Diamondbacks Betting Preview
The Arizona Diamondbacks have also been dangerous at the plate down the stretch, putting up five or more runs in seven of their last 11 contests.
They will counter with right-hander Brandon Pfaadt, who sports an impressive 7-1 win-loss record and a clean 3.51 surface ERA. However, a deeper dive into Pfaadt’s underlying profile reveals that regression may be lurking just around the corner.
Pfaadt’s 3.75 xERA, 4.08 FIP, and 4.33 xFIP are all noticeably higher than his surface ERA, indicating that his record has been padded by a suppressed .259 BABIP.
While Pfaadt exhibits good command with a 104 Location+ and a 46.6% ground-ball rate, his 94 Stuff+ and modest 10.7% K-BB% mean he does not generate elite swing-and-miss stuff. Against a red-hot Philadelphia batting lineup, pitching to contact in high-temperature conditions can quickly lead to trouble.
Environmental factors will also play a massive role tonight. The forecast in Phoenix calls for mid-to-upper 90s at first pitch with humidity dipping below 40%. This classic dry desert heat creates prime conditions for the ball to fly off the bat, providing an ideal setting for offensive fireworks.
Phillies vs Diamondbacks Pick, Betting Analysis
Tonight’s matchup is a textbook scenario for our Bet Labs system titled "Late Season Overs, Lower Totals — COL, ARI, WAS Home." The core premise of this system capitalizes on late-season market inefficiencies in high-variance, hitter-friendly venues like Arizona, Colorado, and Washington when the total line is modest (≤10.5).
During the final stretch of the regular season, sportsbooks and public bettors often undervalue scoring potential, overestimating pitcher durability or assuming playoff pressure will lead to tighter, low-scoring games.
In reality, several factors combine to drive higher run production late in the year. First, high temperatures in the mid-to-upper 90s and humidity under 40% in Phoenix create lower air density, allowing fly balls to carry further.
At the same time, late-season bullpen wear-and-tear combined with expanded rosters introduces unproven arms and creates volatile late-inning matchups.
Furthermore, both lineups enter this contest in peak offensive rhythm, with Philadelphia scoring at least five runs in 11 of their last 17 games and Arizona doing the same in seven of their last 11.
With Aaron Nola stepping up in weight class following three soft matchups, Brandon Pfaadt overdue for ERA regression, and prime hitting weather in the desert, this modest 8.5 total is likely sitting too low.
Pick: Over 8.5 Runs (-105)
