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2026
Kelvin Herrera headshot

Pitcher · 2020

Kelvin Herrera

Age
31
B/T
R/R
Height
5' 10"
Weight
220 lb
Born
December 31, 1989 in Tenares, Dominican Republic
MLB debut
September 21, 2011
dbWAR
3.2
6 season(s)
IP
2.1
ERA
15.43
FIP
13.05
K/9
11.6
FIP−
293
100 = avg

Kelvin Herrera is a relief pitcher for the Chicago White Sox. In 2020 he struck out 3 batters over 2.1 innings across 2 appearances, going 0-0. His ERA of 15.43 was 246.5% higher than the league average of 4.45. Stripping out defence, his 13.05 FIP suggests he pitched better than his ERA shows. He missed bats on 37.5% of swings (16.2% of every pitch he threw), walked 9.1% of the batters he faced and struck out 27.3%. His -0.2 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, 2020.

FIP13.05
K/911.6
WHIP1.71
WAR-.2

Pitching

Standard and advanced, by season.

Trend
2020202.1000343115.4313.051.7111.63.9346293-0.2
201957051.1331603553236.144.581.629.34.01361020.2
201848044.12317431238102.443.951.207.72.059950.3
201764059.13326602856204.254.301.358.53.097990.3
201672072.02612572286122.752.470.9610.81.566591.7
201572069.2430522164262.713.441.128.33.468870.8

Platoon splits

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

Opponent batting by the side the hitter bats from, 2020. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB882103.250.250.625.35537.5%
vs RHB321110.500.6672.000.8930.0%

Pitch sequencing

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

ShowBatter
SinkerChangeupFour-seam

Select a count to see exactly what Kelvin Herrera throws in it.

Pitch arsenal

What he throws, how hard, and how often it misses in 2020.

Sinker48.6%1894.12,14033.3%14.3%
Kelvin Herrera'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.

Head to head

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Kelvin Herrera
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.