Zack Kelly

RHP

Team: Worcester Red SoxThrows: RHeight: 6'3"Weight: 231 lbDOB: Mar 3, 1995Born: Roanoke, VA, USAActive

Compare

Games

3.31

ERA

9.9%

K-BB%

95.9 mph

FB Velo

25.8%

CSW%

Stuff+

106

+6 vs MLB 100

vL 101vR 111▲

DLoc+

-15 vs MLB 100

vL 85▼vR 85▼

Stockyard PLoc+

-5 vs MLB 100

2026 Stockyard PLoc+ -> 2027

Pitching+

-1 vs MLB 100

vL 102vR 102

Synergy

—

Pitch Arsenal

Click a pitch to collapse or expand details

Cutter

43.8%|Pitching+106▲

PLoc+

100-> 2027

Velocity

90.6mph

Spin

2476rpm

CSW%

30.6%

iVB / iHB

7.2" / -4"

Stuff+

DLoc+

Pitching+

vs L

114▲

105▲

109▲

vs R

109▲

101

103

Grade drivers

League-average Cutter · 100 → 113.3

Horizontal geometry

+6.6

Extension

+4.8

Carry along arm slot

+3.5

Velocity

+1.9

Vertical approach angle

−1.9

Seam-shifted wake: amount

−1.8

Everything else

+0.2

Sweeper

21.9%|Pitching+98

PLoc+

97-> 2027

Velocity

81.6mph

Spin

2615rpm

CSW%

27.4%

iVB / iHB

2.4" / -18.3"

Stuff+

DLoc+

Pitching+

vs L

vs R

107▲

94▼

Grade drivers

League-average Sweeper · 100 → 101.2

Break across arm slot

+7.1

Horizontal geometry

−6.9

Extension

+3.3

Velocity

−2.6

Seam-shifted wake: amount

+1.9

Arm angle

+1.0

Everything else

−2.6

Sinker

17%|Pitching+102

PLoc+

98-> 2027

Velocity

95.9mph

Spin

2183rpm

CSW%

20.8%

iVB / iHB

10.9" / 16.1"

Stuff+

DLoc+

Pitching+

vs L

61▼

vs R

113▲

82▼

104

Grade drivers

League-average Sinker · 100 → 108.3

Carry along arm slot

+6.4

Velocity

+4.4

Horizontal geometry

+2.6

Extension

+2.0

Release height

−1.4

Break across arm slot

−1.3

Everything else

−4.4

4-Seam Fastball

13.8%|Pitching+98

PLoc+

84▼-> 2027

Velocity

96.1mph

Spin

2190rpm

CSW%

17.9%

iVB / iHB

15.8" / 7.2"

Stuff+

DLoc+

Pitching+

vs L

54▼

vs R

107▲

45▼

101

Grade drivers

League-average 4-Seam Fastball · 100 → 103.7

Horizontal geometry

+4.1

Carry along arm slot

−2.6

Velocity

+2.6

Vertical approach angle

+2.0

Break across arm slot

+1.4

Release height

−1.2

Everything else

−2.6

Changeup

3.5%|Pitching+—

Velocity

83.6mph

Spin

2080rpm

CSW%

10%

iVB / iHB

2.3" / 18.6"

Stuff+

DLoc+

Pitching+

vs L

—

vs R

—

xRV (Expected Run Value): Expected runs per 100 pitches using xwOBA on batted balls (BABIP-neutral). Negative = good (runs prevented), Positive = bad (runs allowed).

Similar Pitchers

Last 30 games in 2026

Zack Kelly

RHP

Team: Worcester Red SoxThrows: RHeight: 6'3"Weight: 231 lbDOB: Mar 3, 1995Born: Roanoke, VA, USAActive

Compare

Games

3.31

ERA

9.9%

K-BB%

95.9 mph

FB Velo

25.8%

CSW%

Stuff+

106

+6 vs MLB 100

vL 101vR 111▲

DLoc+

-15 vs MLB 100

vL 85▼vR 85▼

Stockyard PLoc+

-5 vs MLB 100

2026 Stockyard PLoc+ -> 2027

Pitching+

-1 vs MLB 100

vL 102vR 102

Synergy

—

Pitch Arsenal

Click a pitch to collapse or expand details

Cutter

43.8%|Pitching+106▲

PLoc+

100-> 2027

Velocity

90.6mph

Spin

2476rpm

CSW%

30.6%

iVB / iHB

7.2" / -4"

Stuff+

DLoc+

Pitching+

vs L

114▲

105▲

109▲

vs R

109▲

101

103

Grade drivers

League-average Cutter · 100 → 113.3

Horizontal geometry

+6.6

Extension

+4.8

Carry along arm slot

+3.5

Velocity

+1.9

Vertical approach angle

−1.9

Seam-shifted wake: amount

−1.8

Everything else

+0.2

Sweeper

21.9%|Pitching+98

PLoc+

97-> 2027

Velocity

81.6mph

Spin

2615rpm

CSW%

27.4%

iVB / iHB

2.4" / -18.3"

Stuff+

DLoc+

Pitching+

vs L

vs R

107▲

94▼

Grade drivers

League-average Sweeper · 100 → 101.2

Break across arm slot

+7.1

Horizontal geometry

−6.9

Extension

+3.3

Velocity

−2.6

Seam-shifted wake: amount

+1.9

Arm angle

+1.0

Everything else

−2.6

Sinker

17%|Pitching+102

PLoc+

98-> 2027

Velocity

95.9mph

Spin

2183rpm

CSW%

20.8%

iVB / iHB

10.9" / 16.1"

Stuff+

DLoc+

Pitching+

vs L

61▼

vs R

113▲

82▼

104

Grade drivers

League-average Sinker · 100 → 108.3

Carry along arm slot

+6.4

Velocity

+4.4

Horizontal geometry

+2.6

Extension

+2.0

Release height

−1.4

Break across arm slot

−1.3

Everything else

−4.4

4-Seam Fastball

13.8%|Pitching+98

PLoc+

84▼-> 2027

Velocity

96.1mph

Spin

2190rpm

CSW%

17.9%

iVB / iHB

15.8" / 7.2"

Stuff+

DLoc+

Pitching+

vs L

54▼

vs R

107▲

45▼

101

Grade drivers

League-average 4-Seam Fastball · 100 → 103.7

Horizontal geometry

+4.1

Carry along arm slot

−2.6

Velocity

+2.6

Vertical approach angle

+2.0

Break across arm slot

+1.4

Release height

−1.2

Everything else

−2.6

Changeup

3.5%|Pitching+—

Velocity

83.6mph

Spin

2080rpm

CSW%

10%

iVB / iHB

2.3" / 18.6"

Stuff+

DLoc+

Pitching+

vs L

—

vs R

—

xRV (Expected Run Value): Expected runs per 100 pitches using xwOBA on batted balls (BABIP-neutral). Negative = good (runs prevented), Positive = bad (runs allowed).

Similar Pitchers

Last 30 games in 2026

Zack Kelly

Pitch Arsenal

Cutter

Sweeper

Sinker

4-Seam Fastball

Changeup

Similar Pitchers

Game Log

Zack Kelly

Pitch Arsenal

Cutter

Sweeper

Sinker

4-Seam Fastball

Changeup

Similar Pitchers

Game Log