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
9–13
W-L
5.06
ERA
1.47
WHIP
99
K
147.2
IP
26
GS
32P-ScoreWEAK
Strong consistency with strikeouts & control still trailing the rest of the profile. He ranks 206th among 224 qualified starters.
How P-Score works →Stats updated Sep 7, 11:36 AM ETLast game Sep 4 at HOU
Season overview
How good is he?
StatPlayerMLB AvgPercentile
Results2550POOR
Strikeouts & Control1850POOR
Run Prevention3050WEAK
Consistency6050ABOVE AVG
Form4650BELOW AVG
Recent form
Last 5 startsPitch arsenal (2026)
Usage %Velocity
- Changeup27.9%88.5 mph
- Four-seam FB27.3%92.1 mph
- Cutter13.1%91.0 mph
- Curveball11.7%82.5 mph
- Slider10.2%86.3 mph
- Sinker9.8%92.3 mph
Hot / cold zones (vs RHB)
.294.310.227.306.356.441.263.318.273
- Better than MLB avg
- Similar to MLB avg
- Worse than MLB avg
Monthly ERA (2026)
Minimum 1 GSSplits
Home / away
Home (11 GS)
6.10
WHIP 1.58
Away (15 GS)
4.36
WHIP 1.40
1.74 ERA better on the road
vs handedness
vs LHH
.864
vs RHH
.751
.113 OPS better vs RHH
By monthERA · IP · K
September4.506.04
August5.8532.124
July1.9527.224
June7.3128.114
May3.4938.224
April9.2014.29
Rest daysERA · WHIP · K/9
5 days (11 GS)4.861.337.0
6+ days (14 GS)5.331.565.3
Sample sizes below four starts are not shown
Career
Frequently asked
What is Merrill Kelly's ERA in 2026?+
5.06 across 26 starts and 147.2 innings, with a 1.47 WHIP and a 5.49 FIP. That ERA ranks 163rd 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 (27.3% at 92.1 mph mph), cutter (13.1% at 91.0 mph mph), curveball (11.7% at 82.5 mph mph), slider (10.2% at 86.3 mph mph), sinker (9.8% at 92.3 mph mph).
What is his P-Score?+
32 out of 100, which we label weak — 206th among 224 qualified starters.
How has he pitched in his last 5 starts?+
A 5.86 ERA, 6.2 K/9, 4.6 BB/9.