DataBaseball
2026
Jake Brentz headshot

P · 2021

Jake Brentz

Age
28
B/T
L/L
Height
6' 1"
Weight
205 lb
Born
September 14, 1994 in Ballwin, MO, USA
MLB debut
April 3, 2021

Age shown as of the 2022 season.

dbWAR
.1
3 season(s)
PA
1
AVG
OBP
1.000
SLG
wRC+
365
100 = avg

Jake Brentz is a pitcher for the Kansas City Royals. In 2021 he hit 0 home runs and knocked in 0 RBIs, notching 0 hits across 1 plate appearances in 1 game. He made contact on 100.0% of his swings. Adjusted for his ballpark and league, his 365 wRC+ puts his offence 265% above average. That comes to 0.0 dbWAR — +0.3 runs with the bat, -0.0 on the bases, +0.0 for the position he plays, against replacement level. It includes no fielding: defensive runs are proprietary and are not estimated here, so the figure credits playing a demanding position but not playing it well.

League context

Percentile among qualified batters, 2021.

wRC+365
wOBA.725
BB%100.0%
WAR.0

How the WAR is built

Runs above replacement, 2021. These four terms sum to +0.4 runs, divided by runs-per-win to give WAR.

Batting+0.3Baserunning-0.0Position+0.0Replacement+0.0
BattingBaserunningPositionReplacement

Batting

Standard and advanced, by season.

Trend
2021110000101.000100.0%0.0%.725+0.33650.0

Pitching

Standard and advanced, by season.

Trend
2022805.1030111491023.638.363.9415.216.9595211-0.2
202172064.0522452676373.664.231.2810.75.286990.3

Platoon splits

How he hits left- and right-handed pitching.

Batting by the hand the pitcher throws with, 2021. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs RHP1000101.000.7250.0%
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 LHB9169821721.116.292.203.25123.1%
vs RHB1871603752055.231.333.406.32629.4%

Hot and cold zones

Batting average by pitch location, 2021.

Situational hitting

How Jake Brentz hits by base state, outs, score and late-game pressure — each read against his own season line.

Split by
By who is on base when he comes up. The season line is repeated as the baseline.
SituationPAABHHRRBIBBSOAVGOBPSLGwOBA
All situations11.000.725
Bases empty · thin10000101.000.725

Runners on includes runners in scoring position, which is the convention every reference uses. Rows under 25 plate appearances are marked thin — at that size a rate moves several dozen points on one hit. Counted from play-by-play, 2021.

Pitch sequencing

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

ShowBatter
Four-seamSliderChangeupSinker

Select a count to see exactly what Jake Brentz throws in it.

Pitch arsenal

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

Four-Seam Fastball58.5%64796.92,24849.8%22.1%
Slider27.8%30885.22,23044.8%43.2%
Changeup12.7%14091.01,68236.4%42.4%
Sinker0.9%1097.12,26520.0%0.0%
Jake Brentz'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 Jake Brentz beside up to three others.

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Jake Brentz
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.