Jack Ralston

RHP

Team: Miami MarlinsThrows: RHeight: 6'6"Weight: 231 lbDOB: Aug 13, 1997Born: Panorama City, CA, USAActive

Compare

Games

5.71

ERA

11.7%

K-BB%

93.6 mph

FB Velo

30.8%

CSW%

Stuff+

-7 vs MLB 100

vL 105▲vR 80▼

DLoc+

-19 vs MLB 100

vL 83▼vR 79▼

Stockyard PLoc+

-20 vs MLB 100

2026 Stockyard PLoc+ -> 2027

Pitching+

106

+6 vs MLB 100

vL 108▲vR 100

Synergy

—

Pitch Arsenal

Click a pitch to collapse or expand details

Split-Finger

51.1%|Pitching+104

PLoc+

87▼-> 2027

Velocity

82.5mph

Spin

905rpm

CSW%

29.6%

iVB / iHB

1.2" / 9.5"

Stuff+

DLoc+

Pitching+

vs L

113▲

108▲

vs R

81▼

100

101

Grade drivers

League-average Split-Finger · 100 → 94.5

Extension

−8.1

Release height

+7.3

Vertical break gap vs fastball

+5.2

Velocity

−5.1

Carry along arm slot

−3.7

Vertical approach angle

−2.2

Everything else

+1.1

4-Seam Fastball

26.4%|Pitching+99

PLoc+

71▼-> 2027

Velocity

93.6mph

Spin

2231rpm

CSW%

34.1%

iVB / iHB

18.5" / 5.4"

Stuff+

DLoc+

Pitching+

vs L

91▼

102

vs R

85▼

84▼

Grade drivers

League-average 4-Seam Fastball · 100 → 87.2

Break across arm slot

−6.2

Carry along arm slot

+4.3

Vertical approach angle

−4.2

Release height

+2.9

Horizontal geometry

−2.6

Velocity

−1.6

Everything else

−5.4

Slider

22.5%|Pitching+107▲

PLoc+

87▼-> 2027

Velocity

85.4mph

Spin

2006rpm

CSW%

30%

iVB / iHB

-0.2" / -1.5"

Stuff+

DLoc+

Pitching+

vs L

106▲

83▼

107▲

vs R

103

77▼

106▲

Grade drivers

League-average Slider · 100 → 105.8

Release height

+7.0

Horizontal geometry

+5.6

Arm angle

−2.4

Velocity

+2.2

Carry along arm slot

+2.2

Spin rate

−2.0

Everything else

−6.8

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

Jack Ralston

RHP

Team: Miami MarlinsThrows: RHeight: 6'6"Weight: 231 lbDOB: Aug 13, 1997Born: Panorama City, CA, USAActive

Compare

Games

5.71

ERA

11.7%

K-BB%

93.6 mph

FB Velo

30.8%

CSW%

Stuff+

-7 vs MLB 100

vL 105▲vR 80▼

DLoc+

-19 vs MLB 100

vL 83▼vR 79▼

Stockyard PLoc+

-20 vs MLB 100

2026 Stockyard PLoc+ -> 2027

Pitching+

106

+6 vs MLB 100

vL 108▲vR 100

Synergy

—

Pitch Arsenal

Click a pitch to collapse or expand details

Split-Finger

51.1%|Pitching+104

PLoc+

87▼-> 2027

Velocity

82.5mph

Spin

905rpm

CSW%

29.6%

iVB / iHB

1.2" / 9.5"

Stuff+

DLoc+

Pitching+

vs L

113▲

108▲

vs R

81▼

100

101

Grade drivers

League-average Split-Finger · 100 → 94.5

Extension

−8.1

Release height

+7.3

Vertical break gap vs fastball

+5.2

Velocity

−5.1

Carry along arm slot

−3.7

Vertical approach angle

−2.2

Everything else

+1.1

4-Seam Fastball

26.4%|Pitching+99

PLoc+

71▼-> 2027

Velocity

93.6mph

Spin

2231rpm

CSW%

34.1%

iVB / iHB

18.5" / 5.4"

Stuff+

DLoc+

Pitching+

vs L

91▼

102

vs R

85▼

84▼

Grade drivers

League-average 4-Seam Fastball · 100 → 87.2

Break across arm slot

−6.2

Carry along arm slot

+4.3

Vertical approach angle

−4.2

Release height

+2.9

Horizontal geometry

−2.6

Velocity

−1.6

Everything else

−5.4

Slider

22.5%|Pitching+107▲

PLoc+

87▼-> 2027

Velocity

85.4mph

Spin

2006rpm

CSW%

30%

iVB / iHB

-0.2" / -1.5"

Stuff+

DLoc+

Pitching+

vs L

106▲

83▼

107▲

vs R

103

77▼

106▲

Grade drivers

League-average Slider · 100 → 105.8

Release height

+7.0

Horizontal geometry

+5.6

Arm angle

−2.4

Velocity

+2.2

Carry along arm slot

+2.2

Spin rate

−2.0

Everything else

−6.8

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

Jack Ralston

Pitch Arsenal

Split-Finger

4-Seam Fastball

Slider

Similar Pitchers

Game Log

Jack Ralston

Pitch Arsenal

Split-Finger

4-Seam Fastball

Slider

Similar Pitchers

Game Log