Starting pitchers
2026 season (MLB rank among qualified starters)
2026 season (MLB rank among qualified starters)
How the starters differ
·Keller allows fewer baserunners, with a 1.37 WHIP compared with 1.57.
·Keller owns a 6.9 K/9 compared with Gallen's 5.5.
·Keller owns the lower FIP, 4.55 to 5.41.
·Keller allows the lower home-run rate: 1.17 vs 1.69 per nine.
Advanced starter metricsERA−, FIP, WAR, career vs opponent
| Metric | Keller | Gallen | Note |
|---|
| ERA− | 122 | 147 | Park- and league-adjusted; 100 is average. |
| FIP | 4.55 | 5.41 | |
| WAR | 1.0 | -0.2 | Season value. |
How the lineups match the starters' pitch mix
Pitch data coverage: partial. Usage and velocity only.
Keller arsenal
| Pitch | Usage | Velo |
|---|
| Four-seam | 32% | 93.3 |
| Sinker | 17% | 92.3 |
| Sweeper | 16% | 82.0 |
| Slider | 10% | 87.2 |
| Curveball | 9% | 77.8 |
| Changeup | 9% | 88.7 |
| Cutter | 7% | 89.7 |
Gallen arsenal
| Pitch | Usage | Velo |
|---|
| Four-seam | 36% | 92.9 |
| Slider | 22% | 88.3 |
| Knuckle Curve | 19% | 81.3 |
| Changeup | 17% | 86.3 |
| Sinker | 6% | 92.7 |
Team OPS vs opposing starter's hand
0.752OPS
.600.700.800.9001.000
0.686OPS
.600.700.800.9001.000
Lineups
Final lineupsOrder from the stored snapshot; treat as unofficial until the card is filed.Full lineup page Lineups not announced
Neither club has posted a batting order. Handedness composition, H-Score leaders and batter-vs-pitcher samples appear here as soon as the first order is filed — typically two to three hours before first pitch.
Team comparison
Results
PIT·
AZ+23712th
Run differential
+21814th
Frequently asked
Who is starting for the Pirates?+
Mitch Keller is listed as the starter.
Who is starting for the Diamondbacks?+
Zac Gallen is listed as the starter.
What time does the game start?+
3:40 PM ET at Chase Field.
Where is the game being played?+
Chase Field, home of the Arizona Diamondbacks.
Are the lineups confirmed?+
Not yet. Orders appear here when they are posted.
How do the starters compare on P-Score?+
Mitch Keller is at 44; Zac Gallen is at 32. P-Score is PitcherStat's 0–100 season index for qualified starters.