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Zach Jackson headshot

Players · J · Pitcher · 2009 regular season

Zach Jackson

Age
26
B/T
L/L
Height
6' 5"
Weight
220 lb
Number
#13
Born
May 13, 1983 in Latrobe, PA, United States
MLB debut
June 4, 2006

Compare with…

dbWAR
.3
Regular season, 4 season(s)
IP
8.2
ERA
9.35
FIP
5.87
K/9
10.4
FIP−
136
100 = avg

Zach Jackson was a relief pitcher for the Cleveland Indians. In 2009 he struck out 10 batters over 8.2 innings across 3 appearances, going 0-0. His ERA of 9.35 was 116.3% higher than the league average of 4.32. Stripping out defence, his 5.87 FIP suggests he pitched better than his ERA shows. He missed bats on 23.0% of swings (10.6% of every pitch he threw), walked 8.5% of the batters he faced and struck out 21.3%. His -0.1 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.

League context

Percentile among qualified pitchers, 2009 regular season.

FIP5.87
K/910.4
WHIP2.08
WAR-.1

WAR by season

0.40.2-0.1060809

Pitching Regular season

Standard and advanced, by season. Regular-season games only.

Trend
2009CLE318.20001491049.355.872.0810.44.2216136-0.1
2008CLE/MIL11958.1230693631165.554.611.464.82.51281070.4
2006MIL8738.1220482322145.405.441.625.23.31191200.0

Batting Regular season

Standard and advanced, by season. Regular-season games only.

Trend
2006MIL613100002.111.111.111.000.1430.0%15.4%.100-2.6-58-0.1—

Platoon splits

How left- and right-handed hitters fare against him.

Opponent batting by the side the hitter bats from, 2009. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB12103102.300.417.600.44616.7%
vs RHB353011148.367.429.500.41022.9%

Pitch sequencing

What Zach Jackson throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter
Four-seamSinkerCutterChangeupCurveball

Select a count to see exactly what Zach Jackson throws in it.

Pitch arsenal

What he throws, how hard, how often it misses, and what hitters do with it.

Four-Seam Fastball36.3%5888.11,86551.7%4.3%11——
Sinker26.3%4287.12,22135.7%29.2%13——
Cutter15.0%2484.91,09450.0%25.0%8——
Changeup13.8%2282.01,57240.9%37.5%4——
Curveball8.1%1376.991553.8%42.9%4——
Zach Jackson's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

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Zach Jackson
How these are computed

wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.