DataBaseball
2026
Hyeon-Jong Yang headshot

Pitcher · 2021

Hyeon-Jong Yang

Age
33
B/T
L/L
Height
6' 0"
Weight
200 lb
Born
March 1, 1988 in Gwangju, Republic of Korea
MLB debut
April 26, 2021
dbWAR
-.6
1 season(s)
IP
35.1
ERA
5.60
FIP
6.51
K/9
6.4
FIP−
153
100 = avg

Hyeon-Jong Yang is a relief pitcher for the Texas Rangers. In 2021 he struck out 25 batters over 35.1 innings across 12 appearances, going 0-3. His ERA of 5.60 was 31.4% higher than the league average of 4.27 — 19th of 22 on his team, and 456th of 567 among MLB pitchers with 20+ innings. Stripping out defence, his 6.51 FIP suggests that his ERA had some help behind him. He missed bats on 20.1% of swings (10.0% of every pitch he threw), walked 10.0% of the batters he faced and struck out 15.6%. His -0.6 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.

FIP6.51
K/96.4
WHIP1.64
WAR-.6

Pitching

Standard and advanced, by season.

Trend
202112435.1030422225165.606.511.646.44.1131153-0.6

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 LHB454112243.293.356.537.3806.7%
vs RHB1151013071222.297.374.535.38819.1%

Pitch sequencing

What Hyeon-Jong Yang throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter
Four-seamChangeupSliderCurveball

Select a count to see exactly what Hyeon-Jong Yang throws in it.

Pitch arsenal

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

Four-Seam Fastball45.8%27189.92,16749.1%18.5%
Changeup27.4%16281.41,69544.4%30.5%
Slider23.0%13680.52,38834.6%13.3%
Curveball3.9%2372.12,33826.1%0.0%
Hyeon-Jong Yang'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 Hyeon-Jong Yang beside up to three others.

Compare — add up to 3 more players
Hyeon-Jong Yang

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.