DataBaseball
2026
Kyle Keller headshot

Pitcher · 2021

Kyle Keller

Age
28
B/T
R/R
Height
6' 4"
Weight
205 lb
Number
#96
Born
April 28, 1993 in Metairie, LA, USA
MLB debut
August 4, 2019
dbWAR
-1.1
3 season(s)
IP
33.1
ERA
6.48
FIP
6.95
K/9
9.7
FIP−
163
100 = avg

Kyle Keller is a relief pitcher for the Pittsburgh Pirates. In 2021 he struck out 36 batters over 33.1 innings across 32 appearances, going 1-1. His ERA of 6.48 was 51.9% higher than the league average of 4.27 — 21st of 24 on his team, and 519th of 567 among MLB pitchers with 20+ innings. Stripping out defence, his 6.95 FIP suggests that his ERA had some help behind him. He missed bats on 21.6% of swings (10.1% of every pitch he threw), walked 14.2% of the batters he faced and struck out 23.2%. His -0.8 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, 2021.

FIP6.95
K/99.7
WHIP1.56
WAR-.8

Pitching

Standard and advanced, by season.

Trend
202132033.1110302436226.486.951.569.75.9152163-0.8
2020202.100032127.714.912.143.97.7173110-0.0
201910010.2000541183.387.621.229.36.875169-0.3

Platoon splits

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

Opponent batting by the side the hitter bats from, 2021. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB6555144915.255.369.564.38723.1%
vs RHB90731651321.219.367.452.36423.3%

Pitch sequencing

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

ShowBatter
Four-seamCurveball

Select a count to see exactly what Kyle Keller throws in it.

Pitch arsenal

What he throws, how hard, and how often it misses in 2021.

Four-Seam Fastball55.7%36494.52,30848.4%12.6%
Curveball44.3%29081.42,51549.3%34.7%
Kyle Keller'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

Put Kyle Keller beside up to three others.

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Kyle Keller

Similar players

Nearest 2021 seasons by command, run prevention and role, on rate statistics rather than totals.

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.