Yankees vs Diamondbacks Prediction, September 18, 2026 | Yankees team total over 3.5
Gerrit Cole vs Eduardo Rodriguez at Chase Field
Published September 18, 2026 · MLB Prediction Data Lab
The published play is New York Yankees Team Total Over 3.5 at -130 for 3 units. The numbers below are 2026 season rates from MLB Stats API, not a recap of a result that has not been graded.
Full slate: MLB picks today, September 18, 2026.
The listed matchup
New York Yankees (88–64) at Arizona Diamondbacks (80–73), Chase Field, Phoenix. Gerrit Cole, a right-hander, is listed for the visitors. Eduardo Rodriguez, a left-hander, is listed for the home club. Void the play if either listed starter is scratched. First-pitch weather listed 72°F, Roof Closed, wind 0 mph, None.
| Side | Listed starter | Record | Park |
|---|---|---|---|
| Yankees | Gerrit Cole | 88–64 | Chase Field |
| Diamondbacks | Eduardo Rodriguez | 80–73 | 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. Gerrit Cole has faced 475 hitters. Eduardo Rodriguez has faced 736.
| Starter | BF | K% | BB% | K−BB | K/BB | Pitches/BF |
|---|---|---|---|---|---|---|
| Gerrit Cole | 475 | 24.6 | 4.6 | 20.0 | 5.32 | 3.70 |
| Eduardo Rodriguez | 736 | 18.3 | 7.9 | 10.5 | 2.33 | 3.90 |
| Starter | W-L | ERA | IP | WHIP | K/9 | BB/9 | HR/9 | Opp AVG |
|---|---|---|---|---|---|---|---|---|
| Gerrit Cole (R) | 8-9 | 3.67 | 115.1 | 1.13 | 9.13 | 1.72 | 1.56 | .241 |
| Eduardo Rodriguez (L) | 15-6 | 2.62 | 178.1 | 1.22 | 6.81 | 2.93 | 0.81 | .236 |
Gerrit Cole sits at a 3.67 ERA with a 1.13 WHIP and 22 walks in 115.1 innings. Eduardo Rodriguez sits at a 2.62 ERA with a 1.22 WHIP and 58 walks in 178.1 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.
| Gerrit Cole — last starts | IP | ER | K | BB | H | HR | Pitches |
|---|---|---|---|---|---|---|---|
| 2026-08-20 | 6.0 | 1 | 8 | 1 | 4 | 1 | 93 |
| 2026-08-27 | 6.0 | 3 | 5 | 1 | 6 | 1 | 79 |
| 2026-09-01 | 5.1 | 3 | 5 | 1 | 8 | — | 90 |
| 2026-09-06 | 7.0 | 4 | 3 | — | 6 | 4 | 84 |
| 2026-09-12 | 4.1 | 5 | 4 | — | 9 | 3 | 77 |
| Eduardo Rodriguez — last starts | IP | ER | K | BB | H | HR | Pitches |
|---|---|---|---|---|---|---|---|
| 2026-08-21 | 5.2 | 0 | 4 | 2 | 4 | — | 99 |
| 2026-08-26 | 7.0 | 0 | 9 | 3 | 2 | — | 104 |
| 2026-09-01 | 5.0 | 3 | 3 | 3 | 8 | — | 103 |
| 2026-09-06 | 6.0 | 1 | 6 | 2 | 3 | 1 | 96 |
| 2026-09-13 | 5.1 | 3 | 7 | 1 | 8 | 1 | 99 |
The run environment, before the starters
Yankees have scored 697 runs in 152 games (4.59 per game) with a .721 OPS. Diamondbacks have scored 678 in 153 (4.43) with a .713 OPS. The pitching staffs have allowed 3.69 and 4.43 runs per game.
| Club | Record | R/G | OPS | Staff ERA | Staff WHIP | RA/G |
|---|---|---|---|---|---|---|
| Yankees | 88–64 | 4.59 | .721 | 3.19 | 1.16 | 3.69 |
| Diamondbacks | 80–73 | 4.43 | .713 | 4.09 | 1.28 | 4.43 |
Reassembling the buckets
Gerrit Cole averages 5.77 innings per start. Eduardo Rodriguez averages 5.94. 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 (Gerrit Cole) | 5.77 | 3.67 | 3.23 | 3.19 | 3.50 |
| Diamondbacks (Eduardo Rodriguez) | 5.94 | 2.62 | 3.06 | 4.09 | 3.12 |
| Combined | 6.62 |
A combined 6.62 projected earned runs against a 3.5 total. 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
Team totals this tight have no cushion. A single homer plus a walk and a double is the whole bet.
What would falsify it
An early exit from the opposing starter, or a three-run inning before the fifth, breaks a 3.5 team total. The number is small enough that one cluster inning does it.
The position
New York Yankees Team Total Over 3.5 at -130, 3 units. A price of -130 implies a 56.5% break-even. Grade it against this published number. If a listed starter is scratched, the play is void.
- New York Yankees ML -110 · 2u
- New York Yankees Team Total Over 3.5 -130 · 3u
Who is on the mound?
Gerrit Cole for Yankees. Eduardo Rodriguez 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. Gerrit Cole at 20.0 points of K−BB separation versus Eduardo Rodriguez at 10.5 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.