DataBaseball
2026
Devin Smeltzer headshot

Pitcher · 2023

Devin Smeltzer

Age
28
B/T
R/L
Height
6' 3"
Weight
195 lb
Born
September 7, 1995 in Voorhees, NJ, USA
MLB debut
May 28, 2019
dbWAR
-.4
5 season(s)
IP
22.1
ERA
6.45
FIP
6.97
K/9
6.4
FIP−
161
100 = avg

Devin Smeltzer is a relief pitcher for the Miami Marlins. In 2023 he struck out 16 batters over 22.1 innings across 9 appearances, going 0-1. His ERA of 6.45 was 48.9% higher than the league average of 4.33 — the worst on his team, and 505th of 550 among MLB pitchers with 20+ innings. Stripping out defence, his 6.97 FIP suggests that his ERA had some help behind him. He missed bats on 19.3% of swings (9.1% of every pitch he threw), walked 4.0% of the batters he faced and struck out 16.0%. His -0.5 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, 2023.

FIP6.97
K/96.4
WHIP1.48
WAR-.5

Pitching

Standard and advanced, by season.

Trend
20239122.101029161646.456.971.486.41.6149161-0.5
2022151270.1520672940193.715.231.225.12.494132-0.4
2021104.200010310.003.810.435.81.90890.0
20207116.020019121556.754.071.508.42.8152910.2
201911649.0221502138123.864.581.277.02.2861020.3

Platoon splits

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

Opponent batting by the side the hitter bats from, 2023. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB383411326.324.395.676.44915.8%
vs RHB6258184210.310.355.569.39316.1%

Pitch sequencing

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

ShowBatter
Four-seamChangeupCurveballSweeperCutter

Select a count to see exactly what Devin Smeltzer throws in it.

Pitch arsenal

What he throws, how hard, and how often it misses in 2023.

Four-Seam Fastball41.0%14889.02,19448.0%13.7%
Changeup27.7%10082.51,51645.0%33.3%
Curveball15.0%5474.62,55551.9%8.3%
Sweeper11.4%4177.72,47922.0%21.4%
Cutter5.0%1883.62,08750.0%11.1%
Devin Smeltzer'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 Devin Smeltzer beside up to three others.

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Devin Smeltzer

Similar players

Nearest 2023 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.