Arizona Diamondbacks#29 · SP
Merrill Kelly
Age 37
Contract Value $20,000,000/yr
Size 6' 2" · 210
Throws RHP
Bats Right
From Houston, TX
10–14
W-L
4.94
ERA
1.46
WHIP
113
K
162.0
IP
29
GS
40P-ScoreBELOW AVG
Strong workload with skill still trailing the rest of the profile. He ranks 169th among 226 qualified starters.
How P-Score worksStats updated Oct 22, 1:07 PM ETLast game Sep 16 vs MIA
Season overview
How good is he?
StatPlayerMLB AvgPercentile
Run Prevention3550WEAK
Skill3250WEAK
Workload6250ABOVE AVG
Consistency4350BELOW AVG
Form3850WEAK
Contact Management3350WEAK
Recent form
Last 5 startsGame log
Pitch arsenal (2026)
Usage %Velocity
- Changeup27.9%88.5 mph
- Four-seam FB27.8%92.1 mph
- Cutter13.0%91.0 mph
- Curveball11.6%82.5 mph
- Slider10.0%86.3 mph
- Sinker9.7%92.4 mph
Hot / cold zones (vs RHB)
.316.300.261.289.375.429.266.322.267
- Better than MLB avg
- Similar to MLB avg
- Worse than MLB avg
Monthly ERA (2026)
Minimum 1 GSSplits
Home / away
Home (13 GS)
5.82
WHIP 1.57
Away (15 GS)
4.36
WHIP 1.40
1.46 ERA better on the road
vs handedness
vs LHH
.864
vs RHH
.745
.119 OPS better vs RHH
By monthERA · IP · K
September4.2015.016
August5.8532.124
July1.9527.224
June7.3128.114
May3.4938.224
April9.2014.29
Rest daysERA · WHIP · K/9
5 days (12 GS)4.921.377.7
6+ days (15 GS)5.161.545.4
Sample sizes below four starts are not shown
Career
Frequently asked
What is Merrill Kelly's ERA in 2026?+
4.94 across 29 starts and 162.0 innings, with a 1.46 WHIP and a 5.40 FIP. That ERA ranks 162nd among qualified starters.
When is his next start?+
No probable start has been announced.
What pitches does he throw?+
He throws changeup (27.9% at 88.5 mph mph), four-seam fb (27.8% at 92.1 mph mph), cutter (13.0% at 91.0 mph mph), curveball (11.6% at 82.5 mph mph), slider (10.0% at 86.3 mph mph), sinker (9.7% at 92.4 mph mph).
What is his P-Score?+
40 out of 100, which we label below avg — 169th among 226 qualified starters.
How has he pitched in his last 5 starts?+
A 3.25 ERA, 8.8 K/9, 3.9 BB/9.