George Kirby

George Kirby

26-Year-Old PitcherSP
Seattle Mariners
2024 Fantasy Outlook
After being highly touted as a prospect, Kirby showed great promise in his debut season in 2022. The right-hander took his game to another level in his sophomore campaign, shaving his walk rate from 4.1% to a minuscule 2.5%, the lowest among qualified starters. Kirby has already made history multiple times with his strike-throwing; he tossed 24 consecutive strikes at one point as a rookie and now owns the record for the most quality starts with zero walks (11) by a pitcher age 25 or younger. Kirby lowered his WHIP from 1.21 as a rookie to 1.04 last season while adding more than 60 innings to his 2022 total. His five-pitch mix would seem to give him some room for growth in the strikeout department (career 23.5 K%), but until we see that growth, Kirby should probably remain just outside the fantasy ace tier. Read Past Outlooks
RANKSFrom Preseason
#39
ADP
$Signed a one-year contract with the Mariners in March of 2024.
Tosses quality start in victory
PSeattle Mariners
April 15, 2024
Kirby (2-2) earned the win over Cincinnati on Monday, allowing two runs on five hits and no walks while striking out six batters over six innings.
ANALYSIS
Kirby was pounded for 13 runs over 7.2 frames across his previous two starts coming into Monday, but he managed to get back on the right track with a quality start and a victory. The right-hander induced 12 whiffs among his 60 strikes and racked up six punchouts after notching just five over his previous two outings combined. Kirby still has a poor 6.64 ERA and 1.33 WHIP over 20.1 innings on the season, but he has two quality starts among his four appearances.
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Pitching Stats
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2024
2023
2022
2020
2024 MLB Game Log
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2023 MLB Game Log
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2022 MLB Game Log
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2020 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
87
Last 10 Games
87
Last 5 Games
87
How many pitches does George Kirby generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does George Kirby generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2022
 
 
-12%
BAA vs LHP
2024
 
 
-38%
BAA vs RHP
2023
Even Split
2022
 
 
-35%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2022vs Left .239 687 168 27 155 28 6 15
Since 2022vs Right .273 701 156 16 184 31 3 22
2024vs Left .364 49 9 2 16 4 0 1
2024vs Right .225 40 10 0 9 4 0 1
2023vs Left .246 354 82 11 83 13 5 10
2023vs Right .247 403 90 8 96 15 2 12
2022vs Left .210 284 77 14 56 11 1 4
2022vs Right .324 258 56 8 79 12 1 9
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2022
 
 
-20%
ERA at Home
2024
 
 
-51%
ERA at Home
2023
 
 
-32%
ERA at Home
2022
 
 
-7%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2022Home 3.18 1.04 181.0 13 8 0 9.4 1.1 0.9
Since 2022Away 3.99 1.21 160.0 10 9 0 7.6 1.2 1.0
2024Home 5.51 1.16 16.1 2 1 0 8.8 1.1 0.6
2024Away 11.25 2.00 4.0 0 1 0 6.8 0.0 2.3
2023Home 2.70 0.89 93.1 8 4 0 9.3 1.0 0.9
2023Away 3.98 1.18 97.1 5 6 0 7.0 0.8 1.2
2022Home 3.28 1.22 71.1 3 3 0 9.7 1.3 1.1
2022Away 3.53 1.19 58.2 5 2 0 8.6 1.8 0.6
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Stat Review
How does George Kirby 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 2019 data (min 120 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.
  • BABIP
    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.
K/BB
9.50
 
K/9
8.4
 
BB/9
0.9
 
HR/9
0.9
 
Fastball
95.5 mph
 
ERA
6.64
 
WHIP
1.33
 
BABIP
.375
 
GB/FB
0.81
 
Left On Base
49.6%
 
Swinging Strike
9.8%
 
Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Latest Fantasy Rumors
Not untouchable?
PSeattle Mariners
July 20, 2023
Kirby could be included as part of a package for Shohei Ohtani, speculates Jim Bowden of The Athletic.
ANALYSIS
Kirby, a 2019 first-round pick, owns a 3.43 ERA this season and a 3.41 ERA across 43 career starts. His .266 expected batting average is subpar, but he counters that with excellent control that's evidenced by his 2.4 percent walk rate, which is the best mark among all qualifiers. He's a logically desirable target in the context of an Ohtani blockbuster.
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Past Fantasy Outlooks
2023
2022
2021
2020
Kirby is an extremely fascinating pitching profile for a few reasons. His primary calling card is his fastball command as he has been incredibly stingy with walks as a pitcher since college. He has 43 walks in 247 innings of professional baseball and walked 50 in 240 innings as a college pitcher at Elon University. He uses that fastball command to fill the strikezone with his fastball as he throws his four-seamer 45% of the time and the league hit .221 against that pitch. That fastball, by velo and movement, aligns him with the likes of Brandon Woodruff, Frankie Montas, Zack Wheeler, and Jameson Taillon according to StatCast. The other part of his profile is the rest of his repertoire is very hittable as every other pitch he threw had an opponents' batting average .266 or higher. Despite that challenge, he won 8 of his 25 starts upon his promotion and still had a good ratios with a stellar 21% K-BB%. If any of his secondary offerings can take a step forward, things could get very interesting for him in a hurry as there were signficant gaps in his actual vs expected batting averages on his cutter, sinker, and slider. Wide awake sleeper!
At this point, Kirby seems like a near finished product by pitching prospect standards, with the main question mark being durability. He regularly went seven or eight days in between starts last year and missed three weeks in May and and another four weeks in July with shoulder/arm issues. All told, the 6-foot-4 righty logged a 2.53 ERA, 1.08 WHIP and 80:15 K:BB in 67.2 innings (15 starts) across High-A and Double-A. He has always had some of the best command and control in the minors, and Kirby now boasts a monster mid-to-high 90s fastball with good life and three secondary offerings with upside -- his plus upper-80s slider is currently his best offspeed pitch. It's easy to see Kirby maxing out as the Mariners' best pitcher and a true frontline arm if he can start pushing up to 150-plus innings, but just getting to 120-plus innings would be an accomplishment in 2022.
On paper, Kirby stacks up with any pitching prospect in the game. The only problem is that we're still mostly working with scouting grades and biographical data, rather than a track record in pro games. His command projects to be as good as, if not better than, that of any other top pitching prospect, which is a nice place to start. He also has a picturesque delivery coming from a prototypical 6-foot-4, 200-pound frame. Kirby's command has typically been the highlight of his scouting report, but his low-90s fastball ticked up and became a mid-90s pitch that touched 99 mph this past summer at the alternate training site. The 20th overall pick in 2019 out of Elon (a small university in North Carolina) also boasts three average or better secondaries, with his slider and changeup each showing plus potential. He is advanced enough to reach the majors with fewer than 100 pro innings under his belt.
Amateur pitchers with Kirby's potentially elite command that also happen to have legitimate stuff are a rare breed. After walking six batters in 88.1 innings as a junior at Elon, Kirby issued zero walks over 23 innings in his debut. He has a prototypical 6-foot-4, 205-pound frame and a picturesque right-handed delivery. While he didn't face tough competition at the small North Carolina school, Kirby has four average or better pitches, with his low-90s fastball playing as a plus pitch due to his command and extension. Given his size, he could realistically gain fastball velocity with pro instruction. With this profile, we should expect excellent numbers, particularly in the lower levels, where his command and deep arsenal should carry the day. If a couple of his offspeed pitches become plus offerings, Kirby could develop into at least a No. 2 starter. Without any improvements, he could be a No. 4.
More Fantasy News
Hit hard in Tuesday's loss
PSeattle Mariners
April 9, 2024
Kirby (1-2) took the loss Tuesday in Toronto, coughing up five runs on eight hits over four innings as the Mariners fell 5-3. He struck out three without walking a batter.
ANALYSIS
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Allows career-high eight runs
PSeattle Mariners
April 4, 2024
Kirby (1-1) took the loss Wednesday, allowing eight runs on 10 hits and no walks over 3.2 innings against the Guardians. He struck out two.
ANALYSIS
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Shuts down Boston in season debut
PSeattle Mariners
March 29, 2024
Kirby (1-0) earned the win in Friday's 1-0 victory over the Red Sox, allowing just two hits and two walks while striking out eight over 6.2 scoreless innings.
ANALYSIS
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One more chance to round into form
PSeattle Mariners
March 20, 2024
Kirby has an 8.31 ERA and 1.73 WHIP over 8.2 innings across three Cactus League starts.
ANALYSIS
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Struggles in first spring start
PSeattle Mariners
February 27, 2024
Kirby didn't factor into the decision in Tuesday's Cactus League tie with the Giants, allowing four runs (three earned) on four hits over 1.1 innings.
ANALYSIS
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