DataBaseball
2026
Walter Pennington headshot

Pitcher · 2024

Walter Pennington

Age
26
B/T
L/L
Height
6' 2"
Weight
205 lb
Born
April 14, 1998 in Broomfield, CO, USA
MLB debut
July 5, 2024
College
Colorado School of Mines
dbWAR
.1
1 season(s)
IP
18.0
ERA
3.00
FIP
4.17
K/9
8.5
FIP−
102
100 = avg

Walter Pennington is a relief pitcher for the Texas Rangers. In 2024 he struck out 17 batters over 18.0 innings across 16 appearances, going 1-0. His ERA of 3.00 was 26.5% lower than the league average of 4.08. Stripping out defence, his 4.17 FIP suggests that his ERA had some help behind him. He missed bats on 26.5% of swings (12.1% of every pitch he threw), walked 13.1% of the batters he faced and struck out 20.2%. 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, 2024.

FIP4.17
K/98.5
WHIP1.67
WAR.1

Platoon splits

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

Opponent batting by the side the hitter bats from, 2024. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB4134101610.294.415.471.39324.4%
vs RHB43379057.243.349.297.30216.3%

Pitch sequencing

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

ShowBatter
SliderSinkerCutter

Select a count to see exactly what Walter Pennington throws in it.

Pitch arsenal

What he throws, how hard, and how often it misses in 2024.

Slider40.9%13583.82,27839.3%40.9%
Sinker30.3%10091.52,23449.0%14.6%
Cutter27.0%8989.42,25748.3%14.3%
Walter Pennington'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.

Pitching

Standard and advanced, by season.

Trend
202416118.010019617113.004.171.678.55.5741020.1

Head to head

Put Walter Pennington beside up to three others.

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Walter Pennington
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.