DataBaseball
2026
Luis De León headshot

Players · L · Pitcher · 2026

Luis De León

Age
23
B/T
L/L
Height
6' 3"
Weight
168 lb
Number
#81
Born
April 14, 2003 in Barahona, Dominican Republic
MLB debut
September 1, 2026
dbWAR
.1
1 season(s)
IP
8.2
ERA
2.08
FIP
4.14
K/9
5.2
FIP−
99
100 = avg

Luis De León is a relief pitcher for the Baltimore Orioles. In 2026 he struck out 5 batters over 8.2 innings across 7 appearances, going 0-2. His ERA of 2.08 is 50.4% lower than the league average of 4.19. Stripping out defence, his 4.14 FIP suggests that his ERA had some help behind him. He missed bats on 13.7% of swings (6.1% of every pitch he threw), walked 6.3% of the batters he faced and struck out 15.6%. 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, 2026.

FIP4.14
K/95.2
WHIP0.69
WAR.1

Pitching

Standard and advanced, by season.

Trend
2026BAL708.202042522.084.140.695.22.150990.1

Platoon splits

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

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB13131104.077.077.308.15630.8%
vs RHB19163021.188.263.188.2175.3%

Pitch sequencing

What Luis De León throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter
SinkerSplitterSlider

Select a count to see exactly what Luis De León throws in it.

Pitch arsenal

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

Sinker66.7%7696.02,36151.3%6.7%16.188.451
Splitter20.2%2384.01,13226.1%27.3%7
Slider13.2%1588.22,63253.3%20.0%6
Luis De León'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

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Luis De León
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.