Brock Stewart

Age 28
  • Born 10/03/1991
  • Bats L
  • Team: Chicago Cubs
2019 Statistics
W-L
4-0
IP
25.2
ERA
9.82
WHIP
1.75
K
19
K%
15.2
2020 Prediction
Coming Soon
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2018
2019
Changeup
13.4% Thrown 82.7 MPH 16.9 CSW%
Four-Seamer
54.1% Thrown 91.5 MPH 30.4 CSW%
Slider
32.5% Thrown 83.6 MPH 24.1 CSW%

Stewart’s changeup is his least-used pitch, and it’s easy to see why: Batters racked up a 100% zone contact rate against the offspeed offering, decimating the pitch for a .533/.556/.867 triple slash. The changeup has never returned a positive pVAL for Stewart, and it’s a pitch that should stay buried in his repertoire.

GIF made by Rich Holman. Blurb written by Erik van Rheenen

Stewart’s fastball boasts a spin rate well above league average (83rd percentile on Baseball Savant), and he’s shown consistency at keeping the heater in the strike zone (59.5% zone rate), but that’s about where the good things to say run out. The four-seamer was responsible for a prodigous .371 ISO from opposing batters, along with a 1.045 OPS and .424 wOBA.

GIF made by Rich Holman. Blurb written by Erik van Rheenen

While Stewart turned to his changeup as his go-to secondary pitch during his 2018 campaign, his slider leapfrogged the change piece in his arsenal’s pecking order last season. Despite putting up a scalding 42.9% strikeout rate a season before, the K% on his slider plummeted to just 10.5% in 2019, and natters torched the breaking ball to the tune of a 40% HR/FB rate.

GIF made by Rich Holman. Blurb written by Erik van Rheenen
2018
2019
Two-Seamer
61.6% Thrown 91.0 MPH
Changeup
31.3% Thrown 81.3 MPH
Slider
7.2% Thrown 83.5 MPH

Stewart’s two-seamer had poor movement, though he controlled the pitch well. It was his least-bad offering, as opponents batted .250 against the pitch, albeit with a .455 slugging percentage.

Stewart had roughly average movement on his change. Considering that he threw it over the plate only 25.3% of the time. the 35.5% chase rate isn’t super impressive. Hitters managed a 172 wRC+ against the pitch.

Considering Stewart only threw his slider 23 times in 2018, there isn’t much to go off of. It was primarily used as a putaway pitch based on its 42.9% strikeout rate, though when hitters made contact, they slugged .857.

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