DataBaseball
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Robbie Ross Jr. headshot

Pitcher · 2017

Robbie Ross Jr.

Age
28
B/T
L/L
Height
5' 11"
Weight
215 lb
Number
#46
Born
June 24, 1989 in Lexington, KY, USA
MLB debut
April 8, 2012
dbWAR
1.2
3 season(s)
IP
9.0
ERA
7.00
FIP
3.82
K/9
9.0
FIP−
88
100 = avg

Robbie Ross Jr. is a relief pitcher for the Boston Red Sox. In 2017 he struck out 9 batters over 9.0 innings across 8 appearances, going 0-0. His ERA of 7.00 was 60.6% higher than the league average of 4.36. Stripping out defence, his 3.82 FIP suggests he pitched better than his ERA shows. He missed bats on 31.4% of swings (13.5% of every pitch he threw), walked 11.1% of the batters he faced and struck out 20.0%. 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, 2017.

FIP3.82
K/99.0
WHIP1.89
WAR.1

Pitching

Standard and advanced, by season.

Trend
2017809.0000127957.003.821.899.05.0161880.1
201654055.1320472056233.253.271.279.13.778780.8
201554060.2026592653203.864.021.307.93.0971020.3

Platoon splits

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

Opponent batting by the side the hitter bats from, 2017. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB22195037.263.364.421.34731.8%
vs RHB23187022.389.522.389.4108.7%

Pitch sequencing

What Robbie Ross Jr. throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter
Four-seamCutterCurveball

Select a count to see exactly what Robbie Ross Jr. throws in it.

Pitch arsenal

What he throws, how hard, and how often it misses in 2017.

Four-Seam Fastball44.2%7291.42,05743.1%46.4%
Cutter31.3%5186.42,25445.1%17.9%
Curveball23.9%3978.62,51333.3%28.6%
Robbie Ross Jr.'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 Robbie Ross Jr. beside up to three others.

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Robbie Ross Jr.
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.