Robert Gsellman

Age 27 RP
  • Born 07/18/1993
  • Bats R
  • Team: New York Mets
2019 Statistics
W-L
-
IP
ERA
0.00
WHIP
0.00
K
K%
0.0
2020 Prediction
Coming Soon
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2018
2019
Changeup
9.5% Thrown 87.3 MPH 32 CSW%
Curveball
11.8% Thrown 81.3 MPH 29 CSW%
Four-Seamer
51.6% Thrown 95.3 MPH 25.6 CSW%
Slider
27.1% Thrown 90.5 MPH 31.6 CSW%

Gsellman’s changeup was a “Money Pitch”, although the pitch only managed an18.6% K% despite a 16.8% SwStr%. This is most likely due to sequencing.

GIF made by Donny Moskovits. Blurb written by Rich Holman

Gsellman primarily used his curveball in situations with two strikes, where he was trying to get a batter to chase. The pitch managed an 11% SwStr% and he walked just two batters on the pitch despite throwing it for strikes just 50% of the time.

GIF made by Donny Moskovits. Blurb written by Rich Holman

Gsellman increased the velocity on his sinker, with the max velocity touching 99. Unfortunately, the pitch ended up having its lowest GB% and K% of Gsellman’s career.

GIF made by Donny Moskovits. Blurb written by Rich Holman

Gsellman made his money with his slider, sporting an 18.3% SwStr% and a 58 wRC+.

GIF made by Donny Moskovits. Blurb written by Rich Holman
2018
2019
Two-Seamer
61.8% Thrown 94.1 MPH
Slider
16.6% Thrown 89.7 MPH
Curveball
11.9% Thrown 81.8 MPH
Changeup
8.7% Thrown 86.6 MPH
Four-Seamer
1.0% Thrown 93.5 MPH

Gsellman’s biggest usage shift when he transitioned to the bullpen was virtually ditching the four-seamer in favor of the sinker. He threw it over 60% of the time, with mixed results. It was around the zone and gave up a fair amount of hits, but not major damage.

Gsellman’s slider was as good as his curveball, with strong strikeout metrics. Batters managed a paltry .133 average against it. The slider Gsellman’s primary breaking ball, just ahead of the curve.

Gsellman added both vertical and horizontal movement to his curveball, and it bounced back after a brutal 2017. The hook had a massive strikeout rate, supported by solid whiff and chase rates. It’s Gsellman’s go-to putaway pitch.

The changeup is Gsellman’s fourth pitch and it struggled in 2018. The pitch had solid whiff and chase numbers, but left the yard too often.

Gsellman hardly threw any four-seamers last season, relying primarily on his sinker. The velocity ticked up slightly with Gsellman working strictly out of the bullpen, but it was still his least-used pitch.

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