Jack Flaherty

Age 24 SP
  • Born 10/15/1995
  • Bats R
  • Team: St. Louis Cardinals
2019 Statistics
W-L
12-10
IP
196
ERA
2.75
WHIP
0.97
K
231
K%
30.0
2020 Prediction
Coming Soon
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2018
2019
Changeup
2.3% Thrown 86.5 MPH 20 CSW%
Curveball
12.0% Thrown 78.2 MPH 33.2 CSW%
Four-Seamer
57.9% Thrown 93.9 MPH 28.6 CSW%
Slider
27.8% Thrown 84.8 MPH 36.7 CSW%

Flaherty hardly threw his changeup, as it came in at just 2% usage this year (3% in 2018). His changeup showed fairly average movement and returned a pretty modest 29.1% zone rate, 8.1% swinging-strike rate, and just a 21.3% chase rate. In short, its just not much of a weapon for him.

GIF made by Mark McElroy. Blurb written by Ryan Amore

A useful weapon to add to Flaherty’s already viscious repertoire is a solid curveball that limited hitters to a 6.9 FB%. Batters hit .192 against Flaherty for the season. Very impressive.

GIF made by NP. Blurb written by Benjamin Haller

Flaherty has a 93 mph heater that produced a 9.8% SwStr, so nothing to write home about. However, it does induce a 31.1% infield flyball rate. Flaherty’s excellent command and 83.3 LOB%, which ranked 4th in MLB, means the Cardinals ace is a bona fide elite SP1.

GIF made by NP. Blurb written by Benjamin Haller

Jack’s slider qualifies as one of the best pitches in baseball with a 16.9 pVal. Improvements in O-Swing% (43.9) and SwStr% (23.5) led the ace to record a 0.91 ERA in the second half of the season along with a 2.22 FIP. Money pitch!

GIF made by NP. Blurb written by Benjamin Haller
2018
2019
Four-Seamer
40.7% Thrown 93.2 MPH
Slider
30.1% Thrown 83.6 MPH
Two-Seamer
15.7% Thrown 90.9 MPH
Knuckle-Curve
11.2% Thrown 77.2 MPH
Changeup
2.4% Thrown 85.1 MPH

Flaherty has a pretty straightforward heater that sits around 93 mph with just less than 8 inches of movement. He generated a 35.0% infield-fly rate, which helped hold opponents to a .650 OPS and earned him an 11.1 pVal despite only an 8.1% swinging-strike rate.

Flaherty’s fastballs may not be anything to write home about, but his slider sure is. It just missed qualifying as a Money Pitch, with a 42.1% O-swing rate and a 22.9% swinging-strike rate but just a 38.5% zone rate. Hitters weren’t able to make meaningful contact even when they did actually hit it, and it led to a nice .637 OPS against and an 8.7 pVal.

Compared with most two-seamers, Flaherty’s is pretty straight, with just less than 4 inches of horizontal movement. It has enough drop to post a tidy 63.1% ground-ball rate, however, which helped him post a 1.4 pVal despite opponents hitting .260 off it.

It’s not quite the elite secondary offering that his slider is, but Flaherty’s knuckle-curve has plenty of appeal on its own. Opponents only mustered a meager .156/.208/.156 slash last season, and he generated a 15.6% swinging-strike rate and a 47.1% ground-ball rate. This pitch probably won’t ever reach the level of his slider, but as a change-of-pace secondary, it’s very good.

Flaherty flashed a changeup about 2.5% of the time last year. It generated a nice 62.5% ground-ball rate and a 12.5% swinging-strike rate, making it a semi-useful weapon — particularly against left-handers. It won’t surpass his two breaking balls on the totem pole anytime soon, however.

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