DataBaseball
2026
Brian Keller headshot

Players · K · Pitcher · 2026

Brian Keller

Age
32
B/T
R/R
Height
6' 3"
Weight
210 lb
Number
#48
Born
June 21, 1994 in Germantown, WI, United States
MLB debut
July 25, 2026
Drafted
2016, round 39
College
Wisconsin-Milwaukee
High school
Germatown
dbWAR
-.0
1 season(s)
IP
3.0
ERA
3.00
FIP
5.44
K/9
9.0
FIP−
130
100 = avg

Brian Keller is a relief pitcher for the Philadelphia Phillies. In 2026 he struck out 3 batters over 3.0 innings across 1 appearance, going 0-0. His ERA of 3.00 is 28.2% lower than the league average of 4.18. Stripping out defence, his 5.44 FIP suggests that his ERA had some help behind him. He missed bats on 16.0% of swings (10.3% of every pitch he threw), walked 0.0% of the batters he faced and struck out 27.3%. His -0.0 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, 2026.

FIP5.44
K/99.0
WHIP0.67
WAR-.0

Pitching

Standard and advanced, by season.

Trend
2026PHI103.000021303.005.440.679.00.072130-0.0—

Platoon splits

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

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB881102.125.125.500.25325.0%
vs RHB331001.333.333.333.29833.3%

Pitch sequencing

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

ShowBatter
CutterFour-seamSweeperSinker

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

Pitch arsenal

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

Cutter33.3%1387.42,29446.2%9.1%5——
Four-Seam Fastball28.2%1192.12,19163.6%16.7%1——
Sweeper25.6%1080.82,36150.0%33.3%4——
Brian 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. 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.

Head to head

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Brian Keller
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.