← BackCorey Kluber
BOS · RHP · 2023
52.3 IP · 254 BF · 966 pitches · 2023 season
HIGH Descriptive — not a forecast
91
Stuff+
11th percentile
94
ABStuff+
6th percentile
92
Pitching+
8th percentile
16.1%
K%
19th percentile
7.9%
BB%
59th percentile
7.69
FIP
8th percentile
Grades describe this season's stuff and run prevention. They are not forecasts: on clean season pairs the model has not beaten naive persistence (RESULTS-MLB §13), so nothing here projects next season.
Percentile rankings
vs 2023 graded MLB pitchers · 52.3 IP · 254 BF · 966 pitches · 2023 season
Stuff
Stuff+91
11th percentile
ABStuff+94
6th percentile
Whiff%20.1%
28th percentile
CSW%33.2%
42th percentile
Results
Pitching+92
8th percentile
RV/100-1.80
14th percentile
FIP7.69
8th percentile
RA/95.68
31th percentile
GB%30.5%
5th percentile
Command
K%16.1%
19th percentile
BB%7.9%
59th percentile
K-BB%8.3%
26th percentile
Velo84.5
5th percentile
How to read these
Each row is his rank, 1 to 99, among all graded MLB pitchers this season; the tick is the median. Green is good for him, red bad, whatever the stat's direction (a low FIP ranks high). Grey circles are descriptive rates with no good direction, and n= in place of a rank means too few events to rank. Grades are descriptive, not forecasts.
Percentile rankings
Raw plate discipline · vs 2023 graded MLB pitchers · 52.3 IP · 254 BF · 966 pitches · 2023 season
Swing & miss
Z-Whf%13.0%
31th percentile
O-Whf%35.1%
29th percentile
Chase%30.6%
71th percentile
Z-Con%87.0%
31th percentile
O-Con%64.9%
29th percentile
SwStr%26.0%
34th percentile
PutAwy%13.1%
16th percentile
Approach
Zone%47.9%
42th percentile
Z-Swg%70.0%
73th percentile, descriptive, no good or bad direction
Swing%49.5%
75th percentile
CS%20.5%
51th percentile
F-Str%52.6%
66th percentile
How to read these
Raw rates with this season's descriptive ranks. Sample-adjusted (shrunk) rankings are not shown yet: the reliability constants behind them were measured on college data and are being re-measured on MLB. Until then a small sample here is a small sample — hover the leaderboard column for its event count.
ArsenalKey columns; every column is on the Arsenal tab
Movement Profile
CB+12.1/+5.6CT+0.4/+0.1SI-0.1/-0.1CH-1.5/-0.2FF-2.0/+0.8ring = slot expectation ±1σ/2σ · HB mirrored for LHP · descriptive
Release Traits
Height: 5.03 ft (±0.11)
Side: -1.88 ft (±0.12)
Extension: 6.48 ft
Season means; the ± is the SD across his pitches. Per-pitch release plots land in a later wave.
Batted Ball Against
Pitch
N_BIP
GB%
FB%
LD%
PU%
Avg EV
Avg LA
HrdHit%
CT
54
14.8
42.6
31.5
0.0
83.3
25.8
48.1
CB
51
31.4
35.3
27.5
0.0
80.3
19.4
27.5
SI
49
32.7
30.6
22.4
0.0
85.7
16.2
55.1
CH
32
53.1
21.9
15.6
0.0
80.2
9.9
28.1
FF
1
0.0
100.0
0.0
0.0
78.6
32.7
100.0
Every pitch type he threw, ordered by balls in play. Rows under 5 BIP are dimmed rather than dropped — a slider put in play twice is a fact about the slider.
Arsenal
Pitches
4
35th pct
Effective mix
3.9
74th pct
Separation
20.2
52nd pct
Shape scatter
3.7 in
91st pct
Velo range
7.7 mph
5th pct
CB · CT · SI · CH
2023 season, 948 pitches; percentiles vs MLB pitchers with 100+ that season. A description of the arsenal, not a grade: none of these predicted next season beyond Pitching+ and his own prior year. For shape scatter a higher percentile is MORE scatter.
Location value
runs per 100 pitches vs league
Total
+0.03
60th percentile
Where he throws
+0.01
55th percentile
Which pitch there
+0.02
57th percentile
Heart30.3%
+132.31/100
Shadow40.2%
+150.11/100
Chase21.5%
−277.79/100
Waste8.0%
−492.99/100
What makes up the total
chase · SI5.5%−0.22
chase · CT6.3%−0.21
shadow · SI11.5%+0.18
shadow · CT10.4%+0.17
shadow · CH6.8%+0.16
15 other locations−0.05
Total+0.03
Pitcher-positive, centred on the 2023 league mean (+0.01 RV/100). Ranks are descriptive: the year-to-year reliability of this mix on MLB has not been measured yet, so no cell is verdict-coloured. His actual run value minus this mix — execution — is deliberately not shown.