DataBaseball
2026
DJ Herz headshot

Pitcher · 2024

DJ Herz

Age
23
B/T
R/L
Height
6' 2"
Weight
197 lb
Number
#77
Born
January 4, 2001 in Fayetteville, NC, USA
MLB debut
June 4, 2024
Drafted
2019, round 8
High school
Sanford
Salary, 2024
$740,000
dbWAR
1.3
1 season(s)
IP
88.2
ERA
4.16
FIP
3.71
K/9
10.8
FIP−
91
100 = avg

DJ Herz is a starting pitcher for the Washington Nationals. In 2024 he struck out 106 batters over 88.2 innings across 19 appearances, 19 of them starts, going 4-9. His ERA of 4.16 was 2.0% higher than the league average of 4.08 — 8th of 16 on his team, and 311th of 541 among MLB pitchers with 20+ innings. Stripping out defence, his 3.71 FIP suggests he pitched better than his ERA shows. He missed bats on 29.3% of swings (14.3% of every pitch he threw), walked 9.4% of the batters he faced and struck out 27.7%. His 1.3 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.

FIP3.71
K/910.8
WHIP1.26
WAR1.3

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 LHB9280193823.237.319.375.31025.0%
vs RHB2902605782883.219.298.354.29228.6%

Pitch sequencing

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

ShowBatter
Four-seamChangeupSliderKnuckle curve

Select a count to see exactly what DJ Herz throws in it.

Pitch arsenal

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

Four-Seam Fastball54.2%86093.52,32454.2%30.5%
Changeup24.5%38983.52,27142.9%26.0%
Slider17.9%28486.12,21643.3%27.5%
Knuckle Curve3.3%5381.22,15052.8%53.3%
DJ Herz'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
2024191988.24907641106364.163.711.2610.83.7102911.3

Head to head

Put DJ Herz beside up to three others.

Compare — add up to 3 more players
DJ Herz

Similar players

Nearest 2024 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.