CHC · P

Caleb Thielbar

Age 39 B/T R/L 6′0″, 205 lb USA MLB debut 2013

40-man

Free agent est. 1 yr × $2.0M ($1M–$5M) if his mutual option is declined
1 caution
- Holds a $6.0M mutual option for 2027; one side almost always declines.
Injured list 2026: Left hamstring strain (Apr 24–May 19)

Keystone Stuff 111 85th pct

2026 fWAR −0.2

Projected 2027 WAR 0.1 Keystone Marcel+ at 29 IP

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 848 pitches

Keystone Stuff 111

Keystone Location 107

Keystone Pitching 112

Run value (xRV) −0.14

Strikeout % 28.3%

Walk % 8.5%

Whiff % 28.9%

Chase % 35.8%

Fastball velo 93.3

Extension 6.2 ft

50.0 IP4.86 ERA4.70 FIP 55° arm3 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

LHP · arm angle 55° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam39% use	39%	93.3	18.8	+4.2	105	101	24%	−1.06
Curveball25% use	25%	76.3	−14.3	−6.8	107	107	29%	+1.05
Slider21% use	21%	87.5	5.2	−4.8	113	103	38%	−0.29
Sweeper14% use	14%	80.2	−1.4	−14.9	108	108	31%	+0.53

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

Most similar pitchers

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

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
45	Ryan Rolison CHC · ’97	105	0.3	0.0	Arb
41	Erik Sabrowski CLE · ’97	111	1.2	0.8	Pre-arb
28	Hogan Harris ATH · ’96	111	0.5	0.5	Arb
20	DL Hall MIL · ’98	111	0.3	0.4	Arb
17	Aaron Ashby MIL · ’98	117	1.5	1.1	Signed $7.7M

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 44%

47% zone

Curveball 38%

37% zone

Slider 18%

37% 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 0.1 WAR Mutual option $6.0M

2028 0.0 WAR Free agent

2029 −0.1 WAR Free agent

2030 −0.2 WAR Free agent

His 2027 is a $6.0M mutual option, decided ≈ Nov 1–5 (either side can decline it). The Free-Agent Board expects it declined, so it prices him as a free agent. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevel	Level	Team	Age	G	PA / IP	PA / IP ·Line
2026A+	A+	South Bend Cubs	39	1	1 IP	1 IP · 0.00 ERA · 40.0% K · 20.0% BB