Portrait of Jack Flaherty

Jack Flaherty PCardinals

Cardinals Player Cards | Cardinals Team Audit | Cardinals Depth Chart

2019 Projections (Rest of Season Projections - seasonal age 23)
Login or Subscribe today for access to projections!
Birth Date10-15-1995
Height6' 4"
Weight205 lbs
Age24 years, 1 months, 4 days
WARP Summary

MLB Statistics

Historical (past-seasons) WARP is now based on DRA..
cFIP and DRA are not available on a by-team basis and display as zeroes(0). See TOT line for season totals of these stats.
Multiple stints are are currently shownClick to hide.
2017 SLN MLB 6 5 21.3 0 2 0 23 10 20 4 89 9.7 4.2 1.7 8.4 49% .322 1.55 5.28 6.33 86 3.28 69.7 0.5
2018 SLN MLB 28 28 151.0 8 9 0 108 59 182 20 93 6.4 3.5 1.2 10.8 43% .257 1.11 3.82 3.34 91 3.07 68.5 3.9
2019 SLN MLB 33 33 196.3 11 8 0 135 55 231 25 92 6.2 2.5 1.1 10.6 41% .242 0.97 3.41 2.75 78 2.44 50.1 7.1

Statistics for All Levels

'opp' stats - Quality of opponents faced - have been moved and are available only as OPP_QUAL in the Statistics reports now.
Minor league stats are currently shownClick to hide.
2014 CRD Rk GCL 8 6 22.7 1 1 0 18 4 28 1 7.1 1.6 0.4 11.1 0% .293 0.97 2.51 1.59 0 0.00 0.0
2015 PEO A MID 18 18 95.0 9 3 0 92 31 97 2 102 8.7 2.9 0.2 9.2 0% .331 1.29 2.82 2.84 86 4.66 102.1
2016 PMB A+ FSL 24 23 134.0 5 9 0 129 45 126 8 92 8.7 3.0 0.5 8.5 49% .316 1.30 3.20 3.56 93 4.35 96.1
2017 SLN MLB NL 6 5 21.3 0 2 0 23 10 20 4 89 9.7 4.2 1.7 8.4 49% .322 1.55 5.28 6.33 86 3.28 69.7
2017 SFD AA TEX 10 10 63.3 7 2 0 47 11 62 2 98 6.7 1.6 0.3 8.8 41% .269 0.92 2.29 1.42 73 2.61 55.5
2017 MEM AAA PCL 15 15 85.3 7 2 0 73 24 85 10 92 7.7 2.5 1.1 9.0 41% .288 1.14 4.09 2.74 91 3.12 66.4
2018 SLN MLB NL 28 28 151.0 8 9 0 108 59 182 20 93 6.4 3.5 1.2 10.8 43% .257 1.11 3.82 3.34 91 3.07 68.5
2018 MEM AAA PCL 5 5 31.7 4 1 0 22 7 41 2 88 6.3 2.0 0.6 11.7 44% .274 0.92 2.92 2.27 69 2.07 43.8
2019 SLN MLB NL 33 33 196.3 11 8 0 135 55 231 25 92 6.2 2.5 1.1 10.6 41% .242 0.97 3.41 2.75 78 2.44 50.1

Plate Discipline

YEAR Pits Zone% Swing% Contact% Z-Swing% O-Swing% Z-Contact% O-Contact% SwStr%
2017 357 0.4986 0.4790 0.7076 0.6348 0.3240 0.8053 0.5172 0.2924
2018 2586 0.4544 0.4575 0.6830 0.6128 0.3281 0.8083 0.4881 0.3170
2019 3108 0.4636 0.4762 0.6905 0.6489 0.3269 0.7829 0.5321 0.3095

Injury History  —  No longer being updated

Last Update: 12/31/2014 23:59 ET

Date On Date Off Transaction Days Games Side Body Part Injury Severity Surgery Date Reaggravation


Year Team Salary
2019 SLN $562,100
2018 SLN $545,000
2017 SLN $
1 yrPrevious$545,000
2 yrPvs + Cur$1,107,100
2 yrTotal$1,107,100


Service TimeAgentContract Status
1 y 6 d1 year/$562,100 (2019)

  • 1 year/$562,100 (2019). Renewed by St. Louis 3/10/19.
  • 1 year (2018). Re-signed by St. Louis 3/18.
  • 1 year (2017). Contract selected by St. Louis 9/1/17.
  • Drafted by St. Louis 2014 (1-34) (Harvard-Westlake HS, Studio City, Calif.). $2M signing bonus ($1.6504M slot).

2019 Preseason Forecast

Last Update: 1/27/2017 12:35 ET

90o 0 0.7 0 1 1 17.4 12 5 20 1 .251 0.96 2.28 2.64 0.4 0.0
80o 0 0.7 0 1 1 13.4 9 4 15 1 .262 1.02 2.58 2.98 0.1 0.0
70o 0 0.7 0 1 1 10.6 8 3 12 1 .271 1.06 2.80 3.23 0.0 0.0
60o 0 0.8 0 1 1 8.2 6 3 9 1 .277 1.10 2.98 3.44 -0.2 0.0
50o 0 0.8 0 1 1 6.0 5 2 7 1 .284 1.13 3.16 3.64 -0.3 0.0
40o 0 0.8 0 1 1 3.9 3 1 4 0 .290 1.17 3.34 3.84 -0.4 0.0
30o 0 0.8 0 1 1 1.6 1 1 2 0 .297 1.21 3.53 4.06 -0.5 -0.1
Weighted Mean00.80115.74271.2831.133.153.62-0.30.0

The rest of this card is restricted to Baseball Prospectus Subscribers.

Not a subscriber? Click here for a free card so you can see what's missing.

Click here for more information on Baseball Prospectus subscriptions or to subscribe and get instant access to the best baseball content on the web.

BP Annual Player Comments

The rest of this card is restricted to Baseball Prospectus Subscribers.

Not a subscriber? Click here for a free card so you can see what's missing.

Click here for more information on Baseball Prospectus subscriptions or to subscribe and get instant access to the best baseball content on the web.

BP Articles

Click here to see articles tagged with Jack Flaherty

BP Chats

2019-08-23 15:30:00 (link to chat)In a points H2H dynasty league would you rather have Jack Flaherty or Chris Paddack?
(Cole from Boston)
I think I'd go with Flaherty, but legitimately might answer differently next week. Tough call. (Craig Goldstein)
2019-06-05 21:00:00 (link to chat)3 Best Buy low hitters and SP right now? Re-draft.
(Frank from Brooklyn )
Among hitters, I'm buying Rougned Odor, Gregory Polanco and Kyle Seager (if you're in a deeper league). Among pitchers, I'd go after Jack Flaherty, Noah Syndergaard and (braces self) Yu Darvish. (Mr. President Bret Sayre)
2019-04-19 18:00:00 (link to chat)14 team, H2H points, dynasty league... in a vacuum who wins: Jack Flaherty for Austin Meadows?
(Bart from Minnesota )
Other than the absolute elite starters, I'm always going to go with offense over pitching. I do like Flaherty's upside. Inside that vacuum and based on performance so far, I'd be looking to get a bit more in return along with Flaherty if I were dealing Meadows. (Scott Delp)
2019-04-19 18:00:00 (link to chat)Lot of stud SPs hurt or sucking... give me three to target a buy low on!
(Harold from Boston )
Jack Flaherty, Luke Weaver and Pablo Lopez (Scott Delp)
2019-04-05 16:00:00 (link to chat)Thoughts on Jack Flaherty? 20tm H2H points keep 8-12. Rebuilding a team I took over. Trade Kieboom and Brendan Rodgers for Flaherty? SP hard to come by. As of now prospects are borderline keepers.
(Robbie Cano’s Bat from Queens)
Long term, Flaherty is a great target. I'm not sure he'll fully repeat 2018 this season, but as long as he improves his walk rate and avoids the home runs, there's a lot to like here. I'm not a huge fan of Kieboom, mostly because he doesn't do any one thing amazingly, but he's low risk. Rodgers has more flash to me, but I can't blame you for targeting young SP when they're hard to get. (Kevin Jebens)
2018-12-19 13:00:00 (link to chat)Who are some of your potential breakout pitchers for 2019 that you are targeting in trades/draft?
(Gary Mack from in the back)
I've been going all out trying to get German Marquez, even though targeting a dude that makes half his starts in Colorado makes me a little queasy. I like Josh James a lot in Houston, and think 2019 could be the year Jack Flaherty and Mike Clevinger become stars. Also, it's become a running joke, but I think Kevin Gausman could finally put it together with a full season in a new spot. (Mark Barry)
2018-04-05 20:00:00 (link to chat)In a h2h 14 team/5 keeper points format I'm rostering both Jack Flaherty and Ryan McMahon. Trying to hold onto both for as long as i can but 5 man bench makes it tough Which of them is most expendable and which is more likely to become a possible trade chip for me this summer when coveted prospects become gold? Thanks
(dylanrox from New Orleans)
In that format I'd drop McMahon. I think Flaherty is back sooner rather than later and will have more value as a trade chip. (Mike Gianella)
2018-04-05 20:00:00 (link to chat)Am I the only one who thinks it is sad when a guy like Jack Flaherty has his career stalled because Adam Wainright doesn't know when to call it quits? I don't see the logic in continuing to toy with a broken down shell of a formerly good pitcher when you have a major league ready prospect who has nothing left to prove in the minors.
(Mr. Fister from Arlington)
I don't think you're the only one. (Mike Gianella)
2018-05-11 13:00:00 (link to chat)Do you think Franchy Cordero is the the real deal, and if so what do you think is his ceiling-----he's certainly opening some eyes right now with his bat in the early going! Also, what are your thoughts about Mike Soroka and Jack Flaherty as potential top of the rotation type guys? Thx.
(bob m from pa)
I love Franchy, more than I probably should. He may settle in as a Puig type where the tools are louder than the results. Soroka and Flaherty are both good but I'm not so sure about top of the rotation. (Nicolas Stellini)
2018-01-11 13:00:00 (link to chat)I have 9 prospects on my dynasty roster and need to get it down to 5. My back end guys are Jack Flaherty, Chance Sisco, Jorge Mateo, Jose DeLeon, Yohander Mendez, and Zack Collins. Which two do I keep? Which ones might have the best trade value in a deep dynasty league?
(edwar288 from Minneapolis)
Mateo is the obvious one from a fantasy standpoint. After that you have three arms without a clear out pitch, and two catchers that might not stick. I'd probably take Flaherty just based on floor, but I don't feel good about it. If you are short catching, hold on to Sisco. I don't feel good about that either. (Jeffrey Paternostro)
2017-08-16 13:00:00 (link to chat)Stephen Gonsalves and Jack Flaherty continue to tear it up in the minors. Do you see either receiving a September call up and making an impact at the major league level?
(Tap Dancer from There)
Gonsalves just got to Rochester, so I wouldn't expect his call up to be imminent unless he continues to dominate. It looks like he's well below his innings output from last season, so if they keep hanging around the WC race, he could be an interesting option.

I'd be more surprised if Flaherty gets a call this year, with their rotation looking a little more crowded and Luke Weaver likely being the next in line at the Triple-A level. (Mark Barry)
2017-06-13 12:00:00 (link to chat)What are scouts saying on Jack Flaherty's performance this season? What is his base-case scenario within a big league rotation? Thanks Craig! Love the articles
(Matt from North Carolina)
They're impressed. It's not a top of the rotation profile, but he could a No. 3 starter (if you believe in such a designation). He's got a full arsenal to work with, and I've heard arguments for him to be a top-50 type. (Craig Goldstein)
2017-01-06 13:00:00 (link to chat)Do you believe in Jack Flaherty as a long term prospect. Really up and down year last year.
(RDBL2014 from Concord, CA)
He's on our Cardinals list, going up next week, but the stock is down a bit. He doesn't have the largest margins for error. I think the system has gotten better around him as well. (Jeffrey Paternostro)
2017-01-06 13:00:00 (link to chat)Saw debate on a site about Jack Flaherty vs Luke Weaver. Said Weaver better short-term, but Flaherty higher ceiling and more likely to be starter long-term. thoughts??
(Donald T from the Towers)
Yeah, I can co-sign that. They are close enough for all that to be well within the fudge factor though. (Jeffrey Paternostro)
2016-09-08 19:00:00 (link to chat)Thanks for the chat George. Can you rank the following young SPs based on talent (exlcuding proximity to majors)? Trevor Clifton, Jack Flaherty, Jaime Schultz, Touki Toussaint. Can I also get your thoughts on the good Basabe brother, and how he compares to other good young OFs (e.g. Acuna, Whitley, Sierra, Mieses, Robles)? GO SOX!
(Anthonyb from Boston)
You got it Anthony! This is a group of starters that I think will all end up in the bullpen, especially Schultz and Toussaint. If I had to pick one, I guess it would be Clifton. I haven't seen Basabe in-person yet, I'm planning on it once he reaches Double-A Portland (in my neck of the woods). The numbers are impressive and he seems like an incredible athlete that is starting to translate those skills into tangible on-field production. I put Robles and Acuna in a higher class than almost any prospect left in the minors. Those two are both top-10-to-15 fantasy prospects for me right now. (George Bissell)
2016-08-11 14:00:00 (link to chat)I missed out on or traded numerous prospects in my NL-only keeper league. Who are some under the radar guys (it's a 10-team league, large reserve list)? They need to have an ETA of 2018 at the latest as the three year clock starts running on them as soon as they are drafted.
(johnklein from east coast)
This is a tough question. Josh Hader is worth rostering in keeper leagues, despite the risky profile. I'm not sure what qualifies for "under-the-radar" in a 10-team league (as it depends on the size of the reserve list), but guys like Forrest Wall, Yusniel Diaz, Cody Ponce, and Jack Flaherty are guys I like. (J.P. Breen)
2016-06-17 13:00:00 (link to chat)Any thoughts on Jack Flaherty's uneven season so far? He is dominating now, wondering what the early issues may have been.
(RDBL2014 from Concord, Ca)
Flaherty got off to a poor start, but the issues were really concentrated in one disastrous outing, with a few so-so ones mixed in. Without having seen him or read a lot of eyewitness reports, the thing I've read about him on multiple occasions is that he lacks an offering that consistently grades out as plus. That can lead to trouble putting hitters away, particularly on days when the command isn't sharp, and stringing a few of those together gives you a slow start. It certainly looks like he's turned it around, though. (Daniel Rathman)
2015-09-09 13:00:00 (link to chat)Are you a believer in Reds' Cody Reed or Cardinals' Jack Flaherty?
(Ricardo from DFW)
Flaherty more than Reed. Flaherty has three above-average pitches and the command could be plus, he could be something. Reed has improved quite a bit, slider is routinely plus like it was coming out of the draft, so there's some upside there, too. I just think Flaherty offers more upside and safety. (Christopher Crawford)
2014-11-20 13:00:00 (link to chat)Have you had the pleasure of seeing Jack Flaherty pitch?
(Perry from Fort Mill, SC)
Absolutely. I'm based in Southern California and I saw him four times this spring after a few looks as an underclassman.

Interesting profile. Was a standout third base prospect as well, would flash power in BP but used an opposite field oriented contact approach in games. Not a big velocity guy, the highest I ever saw out of him was 92 and he generally sat 86-89. But he also threw well over 80% strikes, and more were quality strikes at that. He had the best command of any high school arm in the 2014 draft (and 2014 was one of the best years for HS arms in draft history). It wasn't just fastball command either, he had highly advanced feel for the slider as well, and he could drop his soft curveball in for called strikes (and to give hitters an additional pitch to worry about) and fool hitters with a solid changeup.

The ultimate ceiling comes down to how much he develops and realizes his projection. He won't ever need to be a mid 90s guy to be a successful starter, but if he gets there then we could be talking about a valuable asset. More likely he's a mid rotation innings eater, but there is some ceiling here and he's in a good player dev system. (Todd Gold)
2015-02-09 20:00:00 (link to chat)Hey Nick who was your favorite guy from the 2014 MLB draft that did not make the list?
(Mo from MN)
Touki Toussaint, Michael Chavis, Sean Reid-Foley, Jack Flaherty, Derek Fisher, Max Pentecost, Michael Kopech, Luis Ortiz, Forrest Wall. There's been a solid influx of low-minors talent. (Top 101 Chat)
2014-11-24 13:00:00 (link to chat)How many of your NL Central Top 25 do you expect to make it on the top 100 list when BP publishes it? Average would be around 16 or 17 assuming talent is evenly distributed, right?
(Mike from Texas)
I did say I'd throw a top 25 NL Central Prospects list out there during this chat. With the understanding this is a work in progress (Mellen and I are starting to dig in on the framework for the Top 101), this is my own personal ranking of the prospects covered in our NL Central rankings:

1. SS Addison Russell
2. 3B Kris Bryant
3. RHP Robert Stephenson
4. OF Jorge Soler
5. OF Albert Almora
6. OF Stephen Piscotty
7. LHP Marco Gonzales
8. RHP Tyler Glasnow
9. RHP Jameson Taillon
10. OF Jesse Winker
11. OF/1B Josh Bell
12. RHP Alex Reyes
13. C Kyle Schwarber
14. RHP Michael Lorenzen
15. SS Orlando Arcia
16. OF Tyrone Taylor
17. OF Billy McKinney
18. RHP Pierce Johnson
19. SS Gleyber Torres
20. RHP Jack Flaherty
21. OF Yorman Rodriguez
22. C Reese McGuire
23. RHP Nick Howard
24. RHP Devin Williams
25. LHP Rob Kaminsky

I think all of those guys will be in the discussion for the 101, and expect there to be some shuffling in order of course. Definitely more than the average of 16 or 17. (NL Central Top 10s With Nick Faleris)
2014-11-04 18:00:00 (link to chat)Can you give us a scouting report on Jack Flaherty? I recently saw some video and was impressed by his size, feel for his breaking ball, and his free and easy delivery.
(Jim from KC)
I haven't seen Flaherty in person, but what I'm hearing from industry folks and our internal team suggests he could be a guy that blows up a bit in 2015. What he lacks in experience, he makes up for with early feel for a broad arsenal and good athleticism. I think there's a lot to like here. (Mark Anderson)

BP Roundtables

No BP Roundtables have mentioned this guy.


PITCHf/x Pitcher Profile

A Collaboration between and Baseball Prospectus - Pitch classifications provided by Pitch Info LLC