PIT · P

Antwone Kelly

Age 23 B/T R/R 5′10″, 238 lb Aruba MLB debut 2026

Pittsburgh org 40-man FV 40+ · #19 in org

Winter Plan call-up depth · 0.0 WAR in the role

Keystone Stuff 108 293 pitches · no pct under 500

2026 fWAR −0.2

Projected 2027 WAR 0.1 at 39 IP · 0.0 in his 2027 role

Development · trends & plan

Tracked levels only. Monthly values; gaps mark the offseason. The number beside each line is its last month, with that month’s sample (faded under 50 PA or 150 pitches), not the season.

Trends · MLB

Fastball velo 98.2 mph Sep ’26 · 152 pitches Jul ’26 – Sep ’26

Stuff 104 Sep ’26 · 152 pitches Jul ’26 – Sep ’26

Location 82 Sep ’26 · 152 pitches Jul ’26 – Sep ’26

Whiff rate 18% Sep ’26 · 152 pitches Jul ’26 – Sep ’26

Zone rate 55% Sep ’26 · 152 pitches Jul ’26 – Sep ’26

Walk rate 8.9% Sep ’26 · 45 PA Jul ’26 – Sep ’26

Pitching · 2026

293 pitches: percentiles need 500+, so values only

Keystone Stuff 108

Keystone Location 102

Keystone Pitching 103

Run value (xRV) −0.37

Strikeout % 17.3%

Walk % 9.9%

Whiff % 16.2%

Chase % 25.2%

Fastball velo 98.5

Extension 6.3 ft

18.2 IP4.82 ERA5.83 FIP 39° arm

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

Stuff landscape

RHP · arm angle 39° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam52% use	52%	98.7	15.5	+7.1	101	100	14%	−0.33
Sweeper17% use	17%	87.4	4.0	−8.1	122	120	23%	+0.76
Changeup12% use	12%	87.7	1.8	+12.4	105	85	8%	−2.52
Slider10% use	10%	89.7	2.7	−4.0	105	113	25%	+2.82
Sinker8% use	8%	96.9	9.3	+14.5	96	68	15%	−3.76

Too few pitches to judge the mix: 293 in 2026, and the mix and design checks need 400.

Too few pitches to judge his mix: the Pitch Lab needs 400+ (he threw 293 in 2026), so no mix change or pitch idea is tested for him.

Contract & projection

Club control (RosterResource) · Keystone projected WAR

2027 0.1 WAR Pre-arb (est.) $780K*

2028 0.2 WAR Pre-arb (est.) $803K*

2029 0.3 WAR Pre-arb (est.) $828K*

2030 0.3 WAR Arbitration (est.) $1.6M*

* Estimated: RosterResource has no contract row for him, so control through 2032 estimated from his MLB debut (2026-06-12): six years of service at the earliest; he isn’t in the contract data, and time in the minors would add seasons; pre-arbitration years at the minimum, arbitration years from Keystone’s arbitration model. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevel	Level	Team	Age	G	PA / IP	PA / IP ·Line
2026AAA	AAA	Indianapolis Indians	22	23	91.1 IP	91.1 IP · 4.24 ERA · 17.6% K · 12.2% BB
2025A+	A+	Greensboro Grasshoppers	21	14	59.1 IP	59.1 IP · 3.03 ERA · 30.4% K · 7.4% BB
2025AA	AA	Altoona Curve	21	11	48 IP	48 IP · 3.00 ERA · 23.5% K · 8.2% BB

Prospect Pipeline: Perf+ 89 over his 2026 season (403 BF, mostly AAA), 4.8 years younger than his level; trend −18.4 since 2025. Tag: Watch. MiLB Stuff 95 on 1,538 tracked AAA pitches. Prospects →

FanGraphs: FV 40+ · ETA 2026. Public pitch tracking exists only at Triple-A and some Florida State League parks; where he has it, the development panel above shows it.