Jack Flaherty
Jack Flaherty
23-Year-Old PitcherSP
St. Louis Cardinals
2019 Fantasy Outlook
The year didn't end on a positive note, with Flaherty posting a 5.34 ERA in September, but the overall body of work was stellar, especially for a 22-year-old taking his first real spin through the major leagues. Flaherty's fastball/slider combo is already one of the best in the game, and he can also change speeds although the changeup was a clear fourth offering behind the heater, slider and curve. He used that arsenal to strike batters out at a 29.6% clip, which was a top-10 mark among all pitchers with at least 150 innings. He shot himself in the foot occasionally with walks (3.5 BB/9) and homers (1.19 HR/9), but even marginal improvement to his 57.2% first-pitch strike rate should help on both fronts, and he's proven durable so far in his young professional career. With a rotation spot secured on what looks like a contending club, Flaherty should be viewed as a solid SP2 in mixed leagues. Read Past Outlooks
RANKSFrom Preseason
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$Signed a one-year, $562,100 contract with the Cardinals in March of 2019.
Whiffs nine in win
PSt. Louis Cardinals
August 23, 2019
Flaherty (8-6) earned the win Friday after holding the Rockies scoreless with nine strikeouts over six innings. He allowed three hits and one walk.
The right-hander continued his dominance with yet another brilliant performance. Now on a four-game winning streak, Flaherty has allowed just five runs over his last nine starts (56.1 innings) with a 0.80 ERA and 70 strikeouts in that span. Better yet, the 23-year-old has only surrendered one run over his last 38 frames. On the season, Flaherty owns a 3.32 ERA, 1.09 WHIP and 171:46 K:BB. He'll look to keep rolling when he faces Milwaulkee on the road Wednesday.
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Left/Right Pitching Splits
Since 2017
BAA Batters K BB H 2B 3B HR
Since 2017vs Left .216 637 154 68 122 21 1 23
Since 2017vs Right .205 667 219 47 122 18 2 23
2019vs Left .219 281 65 24 56 11 0 12
2019vs Right .202 314 106 22 57 9 1 10
2018vs Left .194 310 83 39 52 8 1 7
2018vs Right .204 305 99 20 56 9 0 13
2017vs Left .341 46 6 5 14 2 0 4
2017vs Right .225 48 14 5 9 0 1 0
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Home/Away Pitching Splits
Since 2017
ERA at Home
ERA at Home
ERA at Home
ERA at Home
Since 2017Home 3.01 0.96 155.2 9 9 0 10.4 2.3 1.3
Since 2017Away 4.03 1.29 163.0 7 8 0 10.7 4.1 1.3
2019Home 2.67 0.85 77.2 5 3 0 10.8 1.9 1.4
2019Away 4.06 1.35 68.2 3 3 0 10.2 3.9 1.3
2018Home 2.93 1.03 67.2 4 4 0 10.5 2.7 1.2
2018Away 3.67 1.16 83.1 4 5 0 11.1 4.2 1.2
2017Home 6.10 1.26 10.1 0 2 0 7.0 3.5 1.7
2017Away 6.55 1.82 11.0 0 0 0 9.8 4.9 1.6
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Stat Review
How does Jack Flaherty compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against this season's data (min 70 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
93.8 mph
Left On Base
Exit Velocity
87.5 mph
Spin Rate
2194 rpm
Balls Hit 95+ MPH
Swinging Strike
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Jack Flaherty
Monkey Knife Fight MLB: Friday Predictions
Jack Flaherty has posted a 10.9 K/9 rate over his past 50 innings pitched. Juan Carlos Blanco experts the Cardinals righty to have another solid outing Friday.
FanDuel MLB: Friday Breakdown
Adam Zdroik provides his best suggestions for building a winning FanDuel lineup Friday.
Yahoo DFS Baseball: Friday Picks
Mike Barner is targeting Justus Sheffield and the Mariners with a Blue Jays stack Friday at T-Mobile Park.
MLB Barometer: Risers & Fallers
5 days ago
Ryan Rufe analyzes who's rising and falling in baseball this week and makes the case for Ronald Acuna as the top pick in next year's drafts.
DraftKings MLB: Sunday Picks
6 days ago
Mike Barner is endorsing a couple Indians' righties against CC Sabathia, who is projected to start having just come off the injured list.
Past Fantasy Outlooks
Once seen as a likely No. 4 or No. 5 starter, the projectable 6-foot-4 righty finally delivered on the promise evaluators had long envisioned, with his fastball velocity jumping from the low-90s to the mid-90s in 2017. Exceptional command allowed him to profile as a back-end starter when he had middling stuff, and now that command allows him to project as a No. 3 starter. In addition to an improved fastball, Flaherty's slider also took a step forward, now profiling as his second-best offering. His curveball is more of a show-me pitch and his changeup is still developing, but has a chance to be a quality third pitch. Flaherty will not strike out a batter per inning, but should eventually be an asset in ERA and WHIP, and is ready to approach 200 innings. He got a brief taste of the majors last season, and will compete for a rotation spot this spring. One way or another, he figures to spend the bulk of 2018 in the big-league rotation, and makes for a decent flier at the end of deep-league drafts.
The 21-year-old Flaherty may not have the upside of some of the other pitchers in the St. Louis organization, but he achieved a good deal of success at High-A in 2016. The former first-round pick posted a 126:45 K:BB in 134 innings at that level. His fastball sits in the low-90s and is certainly not overpowering, but it does have a lot of movement. His changeup is above average, and Flaherty also features an emerging curveball and slider. In addition, Flaherty possesses an ideal frame at 6-foot-4, 205 pounds that should hold up to the rigors of being a rotation workhorse. Flaherty has the upside of a No. 2 starter and will begin the 2017 campaign at Double-A working to improve his secondary offerings.
Despite missing almost two months with a back injury at the start of the season, Flaherty managed to pass his first test pitching in a full-season league with flying colors. The 6-foot-4 righty posted a 2.84 ERA (2.83 FIP) with a 1.29 WHIP and 97 strikeouts in 95 innings with Low-A Peoria. He probably should have been challenged with a late-season promotion to the Florida State League, as his four-pitch mix was more than enough to dominate Low-A hitters. Flaherty will get his chance with High-A Palm Beach to start his age-20 season, but this may not be a one level per year arm, as the Cardinals might want to see how he fares in the upper levels at some point in 2016. A first-round pick in 2014, Flaherty has three pitches that could reach plus status, giving him a No. 2 ceiling, with the realistic floor of a No. 4 starter.
The Cardinals took Flaherty in the first round of the 2014 draft, inking the 6-foot-4 righty with a bonus well over the slot value for the No. 34 pick. He's several years away from contributing at the big league level but the Cardinals spent a lot to keep him from going to North Carolina for college. He was able to get in six starts in the Gulf Coast League for the Cardinals, posting an impressive 1.59 ERA and 28 strikeouts in just 22.2 innings as an 18-year-old. He could take some big steps forward in 2015, his first full year where his focus will be entirely on pitching, and if he can finish the season in High-A for the Cardinals it will be a great sign of things to come.
More Fantasy News
Cruises to seventh win
PSt. Louis Cardinals
August 18, 2019
Flaherty (7-6) received the win Sunday after allowing one run on three hits and three walks while striking out five over five innings against the Reds.
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Dominates again in win
PSt. Louis Cardinals
August 13, 2019
Flaherty (6-6) got the win against the Royals on Tuesday, tossing seven scoreless innings while yielding just three hits, striking out seven and walking one in the Cardinals' 2-0 victory.
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Dominant in no-decision
PSt. Louis Cardinals
August 7, 2019
Flaherty didn't factor into the decision in Wednesday's 2-1 loss to the Dodgers, giving up four hits and a walk over seven scoreless innings while striking out 10.
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Seven strong innings
PSt. Louis Cardinals
August 2, 2019
Flaherty (5-6) tossed seven scoreless innings Thursday to earn the win over the Cubs, allowing just one hit and two walks with nine strikeouts.
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Fans nine in no-decision
PSt. Louis Cardinals
July 27, 2019
Flaherty didn't factor into the decision in Friday's 5-3 win over the Astros, allowing two runs on three hits and a walk over six innings while striking out nine.
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