DataBaseball
2026
Junior Guerra headshot

Players · G · Pitcher · 2021

Junior Guerra

Age
36
B/T
R/R
Height
6' 0"
Weight
235 lb
Number
#41
Born
January 16, 1985 in San Felix, Venezuela
MLB debut
June 12, 2015
dbWAR
3.3
12 season(s)
IP
65.1
ERA
6.06
FIP
4.75
K/9
8.4
FIP−
111
100 = avg

Junior Guerra was a relief pitcher for the Los Angeles Angels. In 2021 he struck out 61 batters over 65.1 innings across 41 appearances, going 5-2. His ERA of 6.06 was 42.1% higher than the league average of 4.27 — 19th of 23 on his team, and 489th of 567 among MLB pitchers with 20+ innings. Stripping out defence, his 4.75 FIP suggests he pitched better than his ERA shows. He missed bats on 27.2% of swings (11.8% of every pitch he threw), walked 15.0% of the batters he faced and struck out 19.9%. 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, 2021.

FIP4.75
K/98.4
WHIP1.73
WAR.1

WAR by season

2.10.5-1.015161718192021

Pitching

Standard and advanced, by season.

Trend
2021LAA41165.1520674461466.064.751.738.46.31421110.1
2020AZ25023.212017821153.044.121.358.05.768930.2
2019MIL72083.2953583377363.554.521.128.33.9791000.5
2018MIL3126141.069014364136554.094.241.408.73.5981021.4
2017MIL211470.1140614067435.126.581.488.65.5117151-1.0
2016MIL2020121.29309438100432.813.711.137.43.267882.1
2015CWS304.000073316.755.632.006.82.3170142-0.1

Batting

Standard and advanced, by season.

Trend
2021LAA12000001.000.000.000.000.0000.0%50.0%.000-0.5-119-0.0
2019MIL33100002.333.333.333.0001.0000.0%66.7%.291-0.1790.0
2018MIL24374000013.114.114.200.086.1820.0%35.1%.135-5.5-270.0
2017MIL1221000004.000.000.000.000.0000.0%19.0%.000-5.7-120-0.3
2016MIL19438000013.229.229.286.057.3640.0%30.2%.223-3.4330.3

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 LHB122922832819.304.467.457.41415.6%
vs RHB1851643931842.238.319.335.29622.7%

Spray chart

Where every ball he put in play landed, 2021.

Loading 1 batted balls…

Hot and cold zones

Batting average by pitch location, 2021.

—————————1 AB————
Below averageLeague averageAbove average
Batting average by location of the pitch that ended each plate appearance, catcher's view. The bordered square is the strike zone; the outer band is chase territory. Cells with fewer than 8 at-bats are left grey rather than shown as signal. League average on the same attribution is .243.

Pitch sequencing

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

ShowBatter
SinkerFour-seamSplitterCurveballSlider

Select a count to see exactly what Junior Guerra throws in it.

Pitch arsenal

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

Sinker38.4%47193.02,13945.0%15.6%118.347.918
Four-Seam Fastball17.6%21592.22,32844.2%24.2%38.316.964
Splitter15.8%19484.11,00641.8%45.7%47.106.385
Curveball15.8%19480.82,56537.1%33.3%26.192.575
Slider12.3%15184.22,39542.4%41.2%27.148.562
Junior Guerra'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

Put Junior Guerra beside up to three others.

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Junior Guerra

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.