Search Pitcher

Chapman, Aroldis

LHP

Team: Boston Red SoxThrows: LHeight: 6'4"Weight: 235 lbDOB: Feb 28, 1988Born: Holguin, CubaActive

Games

1.17

ERA

30.6%

K-BB%

99.4 mph

FB Velo

31.2%

CSW%

Stuff+

123

vL 121▲vR 125▲

Location+

102

vL 108▲vR 97

Pitching+

112

vL 114▲vR 109▲

Deception

Synergy

Mix+

—

Min. 40 IP

Match+

—

Min. 40 IP

Pitch Arsenal

Click a pitch to collapse or expand details

4-Seam Fastball

39.8%|P+107▲

Velocity

98.4mph

Spin

2448rpm

CSW%

32.3%

iVB / iHB

18.5" / 3.4"

Stuff+

Location+

Pitching+

vs L

120▲

104

109▲

vs R

116▲

105▲

Sinker

33.9%|P+108▲

Velocity

99.4mph

Spin

2434rpm

CSW%

25.4%

iVB / iHB

17" / 10.9"

Stuff+

Location+

Pitching+

vs L

114▲

105▲

107▲

vs R

127▲

100

107▲

Slider

15.2%|P+114▲

Velocity

86.7mph

Spin

2317rpm

CSW%

43.9%

iVB / iHB

4.7" / -10.3"

Stuff+

Location+

Pitching+

vs L

119▲

109▲

117▲

vs R

119▲

103

108▲

Split-Finger

11.1%|P+109▲

Velocity

91.2mph

Spin

1276rpm

CSW%

31.4%

iVB / iHB

4" / 5.1"

Stuff+

Location+

Pitching+

vs L

133▲

105▲

114▲

vs R

132▲

105▲

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

Game Log

Last 30 games in 2025

Search Pitcher

Chapman, Aroldis

LHP

Team: Boston Red SoxThrows: LHeight: 6'4"Weight: 235 lbDOB: Feb 28, 1988Born: Holguin, CubaActive

Games

1.17

ERA

30.6%

K-BB%

99.4 mph

FB Velo

31.2%

CSW%

Stuff+

123

vL 121▲vR 125▲

Location+

102

vL 108▲vR 97

Pitching+

112

vL 114▲vR 109▲

Deception

Synergy

Mix+

—

Min. 40 IP

Match+

—

Min. 40 IP

Pitch Arsenal

Click a pitch to collapse or expand details

4-Seam Fastball

39.8%|P+107▲

Velocity

98.4mph

Spin

2448rpm

CSW%

32.3%

iVB / iHB

18.5" / 3.4"

Stuff+

Location+

Pitching+

vs L

120▲

104

109▲

vs R

116▲

105▲

Sinker

33.9%|P+108▲

Velocity

99.4mph

Spin

2434rpm

CSW%

25.4%

iVB / iHB

17" / 10.9"

Stuff+

Location+

Pitching+

vs L

114▲

105▲

107▲

vs R

127▲

100

107▲

Slider

15.2%|P+114▲

Velocity

86.7mph

Spin

2317rpm

CSW%

43.9%

iVB / iHB

4.7" / -10.3"

Stuff+

Location+

Pitching+

vs L

119▲

109▲

117▲

vs R

119▲

103

108▲

Split-Finger

11.1%|P+109▲

Velocity

91.2mph

Spin

1276rpm

CSW%

31.4%

iVB / iHB

4" / 5.1"

Stuff+

Location+

Pitching+

vs L

133▲

105▲

114▲

vs R

132▲

105▲

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

Pitch Visualizations

Pitch Usage

Usage by Batter Hand

Movement Profile (Induced Break)

Pitching+ by Pitch TypeThe overall grade and per-pitch grades are rescaled independently against different populations. Per-pitch grades compare a pitcher's sinker to all sinkers, slider to all sliders, etc. The overall grade compares a pitcher's total pitch mix against all pitchers. Because averaging across pitch types reduces variance, the overall population is tighter — so the same raw advantage gets amplified more. A pitcher who is consistently above average on every pitch will have an overall grade higher than any individual pitch grade.

Arm Slot

Season Trends

Game-by-game performance across the season

Similar Pitchers

Game Log

Last 30 games in 2025

Pitch Visualizations

Pitch Usage

Usage by Batter Hand

Movement Profile (Induced Break)

Pitching+ by Pitch TypeThe overall grade and per-pitch grades are rescaled independently against different populations. Per-pitch grades compare a pitcher's sinker to all sinkers, slider to all sliders, etc. The overall grade compares a pitcher's total pitch mix against all pitchers. Because averaging across pitch types reduces variance, the overall population is tighter — so the same raw advantage gets amplified more. A pitcher who is consistently above average on every pitch will have an overall grade higher than any individual pitch grade.