Yankees vs Diamondbacks Prediction, September 20, 2026 | Yankees moneyline
Will Warren vs Corbin Burnes at Chase Field
Published September 20, 2026 · MLB Prediction Data Lab
The moneyline on Yankees at -108 is a run-prevention bet first. Will Warren projects 3.60 earned runs allowed across a 5.29-inning start plus relief; Corbin Burnes projects 4.86. The side that prevents more does not have to outslug anyone.
Full slate: MLB picks today, September 20, 2026.
The listed matchup
New York Yankees (89–65) at Arizona Diamondbacks (81–74), Chase Field, Phoenix. Will Warren, a right-hander, is listed for the visitors. Corbin Burnes, a right-hander, is listed for the home club. Void the play if either listed starter is scratched.
| Side | Listed starter | Record | Park |
|---|---|---|---|
| Yankees | Will Warren | 89–65 | Chase Field |
| Diamondbacks | Corbin Burnes | 81–74 | Retractable, artificial turf |
The two starters, measured per batter faced
Rate statistics expressed per nine innings reward pitchers who work deep. Expressing them as a share of batters faced removes that distortion. Will Warren has faced 641 hitters. Corbin Burnes has faced 32.
| Starter | BF | K% | BB% | K−BB | K/BB | Pitches/BF |
|---|---|---|---|---|---|---|
| Will Warren | 641 | 22.9 | 8.0 | 15.0 | 2.88 | 3.91 |
| Corbin Burnes | 32 | 18.8 | 6.2 | 12.5 | 3.00 | 4.12 |
| Starter | W-L | ERA | IP | WHIP | K/9 | BB/9 | HR/9 | Opp AVG |
|---|---|---|---|---|---|---|---|---|
| Will Warren (R) | 10-6 | 3.89 | 148.0 | 1.36 | 8.94 | 3.10 | 1.28 | .260 |
| Corbin Burnes (R) | —-— | 5.87 | 7.2 | 1.17 | 7.04 | 2.35 | 2.35 | .241 |
Will Warren sits at a 3.89 ERA with a 1.36 WHIP and 51 walks in 148.0 innings. Corbin Burnes sits at a 5.87 ERA with a 1.17 WHIP and 2 walks in 7.2 innings. Walks stabilize faster than earned runs, so the walk column is the more trustworthy August reading.
Direction inside the season
Season aggregates hide the last month. These are the prior starts, excluding today's outing so the table does not leak a result into a published prediction.
| Will Warren — last starts | IP | ER | K | BB | H | HR | Pitches |
|---|---|---|---|---|---|---|---|
| 2026-08-25 | 5.0 | 2 | 4 | 2 | 7 | 1 | 97 |
| 2026-08-30 | 7.0 | 1 | 7 | 1 | 6 | — | 98 |
| 2026-09-04 | 2.1 | 0 | — | 1 | — | — | 28 |
| 2026-09-09 | 6.0 | 1 | 8 | 2 | 4 | 1 | 95 |
| 2026-09-14 | 5.2 | 0 | 6 | 2 | 5 | — | 92 |
| Corbin Burnes — last starts | IP | ER | K | BB | H | HR | Pitches |
|---|---|---|---|---|---|---|---|
| 2026-09-08 | 3.0 | 0 | 2 | 2 | 2 | — | 57 |
| 2026-09-14 | 4.2 | 5 | 4 | — | 5 | 2 | 75 |
The run environment, before the starters
Yankees have scored 709 runs in 154 games (4.60 per game) with a .721 OPS. Diamondbacks have scored 685 in 155 (4.42) with a .712 OPS. The pitching staffs have allowed 3.69 and 4.45 runs per game.
| Club | Record | R/G | OPS | Staff ERA | Staff WHIP | RA/G |
|---|---|---|---|---|---|---|
| Yankees | 89–65 | 4.60 | .721 | 3.18 | 1.16 | 3.69 |
| Diamondbacks | 81–74 | 4.42 | .712 | 4.11 | 1.28 | 4.45 |
Reassembling the buckets
Will Warren averages 5.29 innings per start. Corbin Burnes averages 3.83. Weight each starter's own earned run average across that length, then hand the remainder of the nine innings to his club's season staff rate. That is a conservative relief proxy — it mixes rotation and bullpen — and it is stated as a limitation, not hidden.
| Side | Starter IP | Starter ERA | Relief IP | Staff ERA | Projected ER |
|---|---|---|---|---|---|
| Yankees (Will Warren) | 5.29 | 3.89 | 3.71 | 3.18 | 3.60 |
| Diamondbacks (Corbin Burnes) | 3.83 | 5.87 | 5.17 | 4.11 | 4.86 |
| Combined | 8.46 |
A combined 8.46 projected earned runs. Unearned runs are ignored. Neither starter hits his average length every night. The opposing lineups are not in the formula; they sit in the table above.
The park
Chase Field is listed at 328 feet to left, 412 feet to left center, 407 feet to center, 414 feet to right center, 335 feet to right, on artificial turf, retractable at 1086 feet above sea level with a listed capacity of 48,405. Park dimensions do not decide a total by themselves. They decide whether a walk plus a ball in the air becomes two runs or a long out.
Where this reading is weakest
Moneyline edges this thin die when the length assumption fails. If the better starter is out in the fourth, the staff rate takes over and the partition no longer applies.
What would falsify it
A short outing from the starter on the backed side, or a crooked inning against the relief bucket that the partition treats as average, is the miss. The model is only as good as the length assumption of 5.29 and 3.83 innings.
The position
Yankees Moneyline at -108, 1.5 units. A price of -108 implies a 51.9% break-even. Grade it against this published number. If a listed starter is scratched, the play is void.
- Yankees Moneyline -108 · 1.5u
Who is on the mound?
Will Warren for Yankees. Corbin Burnes for Diamondbacks. Those names come from the MLB probable-pitcher feed, not from a guessed rotation.
Why use batters-faced rates instead of ERA?
Earned run average is a counting result. Strikeout and walk rates as a share of batters faced describe the process that produced it, and they stabilize on a smaller sample. Will Warren at 15.0 points of K−BB separation versus Corbin Burnes at 12.5 is the comparison ERA hides.
How is the pick graded?
Against the published price, on the public record. Pending is not a win. Today's full card lives at a stable URL: mlb-picks.html.
Pick, odds, and unit size come from the BetLegend daily tracker. Probable starters, season rates, and venue facts are from the MLB Stats API. Educational analysis. 18+ only. 1-800-GAMBLER.