PIT · P

Kirby Yates

Age 39 B/T L/R 5′10″, 205 lb USA MLB debut 2014

Pittsburgh org 40-man

Free agent est. 1 yr × $3.3M ($2M–$8M)
Injured list 2026: Right shoulder impingement (Sep 3–Sep 22)

Keystone Stuff 93 20th pct

2026 fWAR 0.5

Projected 2027 WAR 0.2 Keystone Marcel+ at 26 IP

This winter

What the Winter Plan does with Yates: its decisions feed, the dated moves and the briefs

Leaves as a free agent after the World Series.

≈ Nov 5 Pending free agents come off the 40-man: Kirby Yates, Gregory Soto, Brandon LoweCounted from today's 40-man; the plan's starting roster already leaves them out.

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 89.9 mph Sep ’26 · 42 pitches Apr ’24 – Sep ’26

Stuff 96 Sep ’26 · 42 pitches Apr ’24 – Sep ’26

Location 124 Sep ’26 · 42 pitches Apr ’24 – Sep ’26

Whiff rate 14% Sep ’26 · 42 pitches Apr ’24 – Sep ’26

Zone rate 45% Sep ’26 · 42 pitches Apr ’24 – Sep ’26

Walk rate 0.0% Sep ’26 · 9 PA Apr ’24 – Sep ’26

Clear changes

▼ fastball velocity 92.8 mph → 90.8 mph −2.0 mph 2025 → 2026 · MLB

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 726 pitches

Keystone Stuff 93

Keystone Location 100

Keystone Pitching 88

Run value (xRV) +0.60

Strikeout % 27.5%

Walk % 9.6%

Whiff % 28.0%

Chase % 35.3%

Fastball velo 90.8

Extension 6.1 ft

42.1 IP3.19 ERA3.19 FIP 18° arm3 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

Stuff landscape

RHP · arm angle 18° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam66% use	66%	90.8	13.3	+14.4	96	103	26%	+1.40
Splitter33% use	33%	84.4	−1.3	+11.4	92	93	33%	−0.54

No mix change or new pitch clears its bar. The arsenal is efficient for its shapes.

Most similar pitchers

Pitches like Yates: same hand, shape, slot and mix

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
42	Raisel Iglesias ATL · ’90	92	1.1	0.5	Free agent
32	Cole Sulser TB · ’90	100	0.6	0.2	Arb
31	Chase Silseth TEX · ’00	98	0.4	0.3	Pre-arb
29	Huascar Brazobán CWS · ’89	91	0.7	0.2	Arb
27	Casey Legumina TB · ’97	105	0.4	0.2	Pre-arb

Same-handed pitchers nearest on fastball velocity and shape, arm angle, extension, pitch mix, secondary shapes, Stuff, whiff rate and workload. 2026 regulars only.

Pitch locations · 2026

Where each pitch finishes, by batter side

Four-seam 65%

51% zone

Splitter 33%

22% zone

Where each pitch finishes, catcher’s view. The bar marks the batter’s side; the box is an average strike zone. Pitches with 40+ thrown to this side.

Contract & projection

Club control (RosterResource) · Keystone projected WAR

2027 0.2 WAR Free agent

2028 0.1 WAR Free agent

2029 0.0 WAR Free agent

2030 −0.1 WAR Free agent

A pending free agent: no club controls his 2027. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevel	Level	Team	Age	G	PA / IP	PA / IP ·Line
2026A	A	Rancho Cucamonga Quakes	39	2	2 IP	2 IP · 0.00 ERA · 44.4% K · 11.1% BB
2026AAA	AAA	Salt Lake Bees	39	2	2 IP	2 IP · 27.00 ERA · 25.0% K · 0.0% BB
2025AAA	AAA	Oklahoma City Comets	38	1	1 IP	1 IP · 0.00 ERA · 25.0% K · 25.0% BB