MLB matchup analysis
Phillies vs Diamondbacks Prediction, Odds and Model Pick
Wednesday, September 2, 2026 at Chase Field · 3:40 PM ET
LyDia decision: Pass on Phillies vs Diamondbacks
The case for Arizona Diamondbacks
The case for Philadelphia Phillies
Why it is not official
Why the setup score is what it is
Why the price is what it is
Read the full model output
This is a bullpen game -- no confirmed traditional starter, so LyDia does not publish an official pick here.
Final result
Phillies 0, Diamondbacks 1
How the analysis held up
Arizona Diamondbacks won, the side LyDia's model favored.
LyDia's two internal reads disagreed pregame by 70.7 points — the team-strength model favored Arizona Diamondbacks, the run-projection model favored Philadelphia Phillies. The team-strength model had the winner here.
Taylor Clarke (Arizona Diamondbacks), the starter LyDia's pitcher score favored, actually outpitched Andrew Painter: 1.2 IP, 0 ER (0.00 ERA) against 7.0 IP, 0 ER (0.00 ERA). The edge held up. Both starters were sharp; the edge is a narrow one between two good outings.
The Philadelphia Phillies bullpen was not flagged pregame, but it had a night worth noting: 1 earned run allowed over 1.0 relief innings (9.00 ERA) — quietly worse than the pregame read implied.
The Arizona Diamondbacks bullpen was not flagged pregame, but it had a night worth noting: 0 earned runs allowed over 7.1 relief innings (0.00 ERA) — quietly better than the pregame read implied.
Philadelphia Phillies scored 0, 6.1 fewer than the 6.1 pregame projection.
Arizona Diamondbacks scored 1, 2.9 fewer than the 3.9 pregame projection.
Game information
| Matchup | Philadelphia Phillies at Arizona Diamondbacks |
|---|---|
| Date | Wednesday, September 2, 2026 |
| First pitch | 3:40 PM ET |
| Venue | Chase Field |
| Starting pitchers | Andrew Painter vs Taylor Clarke |
| Weather | Game-time forecast: 102°F, 1% precipitation chance, 10 mph wind from W. This venue has a roof, but the roof status is not confirmed. |
Starting pitcher matchup
Full Pitcher Matchup Tool →| Metric | Phillies | Diamondbacks |
|---|---|---|
| Pitching plan | Traditional starter | Opener / bullpen game |
| Expected innings | 5 | 1⅔ |
| Throws | R | R |
| LyDia pitcher score (higher is better) | 52 | 78 |
| ERA (lower is better) | 5.55 | 2.53 |
| WHIP (lower is better) | 1.37 | 0.88 |
| K/9 (higher is better) | 7.8 | 5.3 |
| K-BB% (higher is better) | 11.8% | 10.7% |
| K% (higher is better) | 20.0% | 15.6% |
| BB% (lower is better) | 8.1% | 4.9% |
| BB/9 (lower is better) | 3.2 | 1.7 |
| HR/9 (lower is better) | 1.5 | 0.8 |
| Ground-ball rate | 42.6% | 51.7% |
| Fly-ball rate | 57.4% | 48.3% |
Pitching plan edge: LyDia gives the Arizona Diamondbacks pitching plan the edge over Andrew Painter (17 points on LyDia's pitcher score). Taylor Clarke is projected for only 1⅔ innings, with the Arizona Diamondbacks bullpen covering the rest -- this compares the Arizona Diamondbacks blended starting-pitcher-and-bullpen quality against Andrew Painter's own line, not two starters directly.
Blended read: For the Arizona Diamondbacks, the bullpen is projected to throw more of the game than Taylor Clarke (about 1⅔ innings for the starter), so LyDia grades that side on a whole-game effective ERA of 3.94 rather than Taylor Clarke's own 2.53. Whole-game, that is 3.28 for the Philadelphia Phillies against 3.94 on the other side, so the blended read leans Philadelphia Phillies.
How to read this: the scorecards above name the starters; every number lives in this table.
Strikeout Projections Full strikeout projections →
Same data source as the Pitcher Matchup Tool, where every starter on the slate is compared side by side.
Recent form
Full Stats page →Phillies are 8-2 in their last 10 and averaging 5.2 runs per game over the last 15 days; Diamondbacks are 5-5 in their last 10 and averaging 4.2 runs per game over the last 15 days. Season run differential separates them by almost nothing (+0.26 against -0.01).
| Metric | Phillies | Diamondbacks |
|---|---|---|
| Last 10 | 8-2 | 5-5 |
| Last 10 by venue (away team on the road, home team at home) | 7-3 on the road | 5-5 at home |
| OPS, last 15 days | 0.741 | 0.704 |
| wOBA, last 15 days (hot/cold read) | 0.327 | 0.313 |
| Runs per game, last 15 days | 5.2 | 4.2 |
| K% last 15 days (lower is better) | 17.1% | 19.0% |
Last 15 days only. Hot and cold streaks for all 30 teams live on the Stats page.
30-day offense
Full offense tool →| Last 30 days | Phillies | Diamondbacks |
|---|---|---|
| OPS | 0.743 (+0.030 vs szn) | 0.727 (+0.017 vs szn) |
| Runs per game | 5.04 (+0.529 vs szn) | 4.14 (-0.316 vs szn) |
| wOBA (model offense input) | 0.328 (+0.014 vs szn) | 0.320 (+0.006 vs szn) |
| K% (lower is better) | 16.2% (-5.9% vs szn) | 19.1% |
Over the last 30 days the Phillies have been the better offense, 0.328 wOBA to 0.320. They are running hot against their own season line (+0.014 wOBA).
Season profile
Full Stats page →| Metric | Phillies | Diamondbacks |
|---|---|---|
| Record | 79-60 | 73-67 |
| Run differential / game (team quality) | +0.26 | -0.01 |
| Runs scored / game (offense, season) | 4.51 | 4.45 |
| Runs allowed / game (defense, season, lower better) | 4.25 | 4.46 |
| Season OPS | 0.716 | 0.712 |
| K% season (lower is better) | 22.1% | 19.3% |
| OPS vs opposing hand (season) | 0.719 | 0.685 |
Season-long team quality, not recent form. Run differential and run environment come from the season standings; splits for all 30 teams live on the Stats page, including the run environment table.
The Map
Full interactive map →Every team on today's slate, on any two axes you pick. Phillies and Diamondbacks are highlighted.
Bullpen matchup
Full Bullpen Fatigue Index →Risk is what the model actually uses: fatigue blended with how well the pen has pitched. High fatigue with high efficiency is a tired pen that is still getting outs.
| Metric | Phillies | Diamondbacks |
|---|---|---|
| Fatigue | 6.4/10, Tired | 6.3/10, Tired |
| Efficiency | 7.4/10, Effective | 4.8/10, Average |
| Combined risk | 5.2/10, Normal | 6.4/10, Tired |
| Relief innings, last 7 days | 17.3 | 23.3 |
| Back-to-back arms | 6 | 6 |
| 7-day ERA | 1.04 | 4.24 |
| 7-day WHIP | 0.98 | 1.41 |
Fatigue measures workload. Efficiency measures recent run prevention. Combined risk is what the moneyline and totals systems use.
Run total projection
Full Totals Projections →The model projects 3.8 runs above the market total. A research lean still requires a setup rating of at least 7.0/10. Team totals remain research-only until their graded sample is established.
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