highest strikeout percentage by mlb pitcher in 2023

John McMillon had the best strikeout percentage in 2023, with a strikeout percentage of 61.5 in his rookie season.

NAMEK%SEASONTMGWLW%GSERASOCGSHOSVIPHERRHRBBHBPGFIBBTBFWPK/9BB/9K/BBHR/9BB%WHIPBABIPRAERA-FIPFIP-H/9PRAA
1John McMillon
J. McMillon
61.5
2023
4
0
0
0
2.25
8
0
0
0
4.0
1
1
1
1
0
0
3
0
13
0
18.00
0.00
2.25
0.0
0.25
.000
2.25
50
2.50
58
2.25
0.8
2Heath Hembree
H. Hembree
50.0
2023
1
0
0
0
0.00
2
0
0
0
1.1
0
0
0
0
1
0
0
0
4
0
13.50
6.75
2.00
0.00
25.0
0.75
.000
0.00
0
2.50
60
0.00
0.3
3Ryder Ryan
R. Ryan
50.0
2023
1
0
0
0
0.00
2
0
0
0
1.0
0
0
0
0
1
0
0
0
4
0
18.00
9.00
2.00
0.00
25.0
1.00
.000
0.00
0
2.25
55
0.00
0.2
4Caleb Boushley
C. Boushley
50.0
2023
1
1
0
1.000
0
3.86
5
0
0
0
2.1
1
1
1
1
2
0
1
1
10
1
19.29
7.71
2.50
3.86
20.0
1.29
.000
3.86
88
7.11
161
3.86
-0.7
5Kyle Hurt
K. Hurt
50.0
2023
1
0
0
0
0.00
3
0
0
0
2.0
0
0
0
0
0
0
1
0
6
0
13.50
0.00
0.00
0.0
0.00
.000
0.00
0
0.25
6
0.00
0.9
6Chris Vallimont
C. Vallimont
50.0
2023
1
0
0
0
0.00
1
0
0
0
0.2
1
0
0
0
0
0
1
0
2
0
13.50
0.00
0.00
0.0
1.50
1.000
0.00
0
0.25
6
13.50
0.3
7Yoendrys Gómez
Y. Gómez
50.0
2023
1
0
0
0
0.00
4
0
0
0
2.0
1
0
0
0
0
1
1
0
8
0
18.00
0.00
0.00
0.0
0.50
.333
0.00
0
0.75
17
4.50
0.8
8Alek Jacob
A. Jacob
50.0
2023
3
0
0
0
0.00
5
0
0
0
3.0
0
0
0
0
1
0
2
0
10
0
15.00
3.00
5.00
0.00
10.0
0.33
.000
0.00
0
0.92
21
0.00
1.1
9Elvin Rodríguez
E. Rodríguez
50.0
2023
1
0
0
0
0.00
5
0
0
0
3.1
0
0
0
0
0
0
1
0
10
0
13.50
0.00
0.00
0.0
0.00
.000
0.00
0
0.25
6
0.00
1.5
10Guillo Zuñiga
G. Zuñiga
50.0
2023
2
0
0
0
4.50
4
0
0
0
2.0
2
1
1
0
0
0
2
0
8
0
18.00
0.00
0.00
0.0
1.00
.500
4.50
105
-0.75
-17
9.00
1.1
11Sean Reid-Foley
S. Reid-Foley
47.1
2023
8
0
1
.000
0
3.52
16
0
0
0
7.2
4
3
3
0
6
0
1
0
34
0
18.78
7.04
2.67
0.00
17.6
1.30
.333
3.52
84
1.43
33
4.70
2.5
12Félix Bautista
F. Bautista
46.4
2023
56
8
2
.800
0
1.48
110
0
0
33
61.0
30
10
14
4
26
2
46
0
237
7
16.23
3.84
4.23
0.59
11.0
0.92
.274
2.07
35
1.87
45
4.43
16
13Jeffrey Springs
J. Springs
43.6
2023
3
2
0
1.000
3
0.56
24
0
0
0
16.0
4
1
1
1
4
0
0
0
55
0
13.50
2.25
6.00
0.56
7.3
0.50
.115
0.56
14
1.81
44
2.25
4.3
14Tyler Duffey
T. Duffey
42.9
2023
1
0
0
0
4.50
3
0
0
0
2.0
1
1
1
1
0
0
0
0
7
0
13.50
0.00
4.50
0.0
0.50
.000
4.50
106
6.75
157
4.50
-0.6
15Orion Kerkering
O. Kerkering
42.9
2023
3
1
0
1.000
0
3.00
6
0
0
0
3.0
3
1
1
0
2
0
0
0
14
0
18.00
6.00
3.00
0.00
14.3
1.67
.500
3.00
69
1.25
28
9.00
1.1
16Aroldis Chapman
A. Chapman
41.4
2023
TOT
61
6
4
.600
0
3.09
103
0
0
6
58.1
37
20
24
4
36
1
18
2
249
9
15.89
5.55
2.86
0.62
14.5
1.25
.314
3.70
71
2.51
58
5.71
11.7
17Kody Funderburk
K. Funderburk
40.4
2023
11
2
0
1.000
0
0.75
19
0
0
0
12.0
6
1
1
1
5
1
4
0
47
0
14.25
3.75
3.80
0.75
10.6
0.92
.238
0.75
18
2.67
62
4.50
2.2
18Jose Espada
J. Espada
40.0
2023
1
0
0
0
0.00
2
0
0
0
1.0
0
0
0
0
2
0
1
0
5
0
18.00
18.00
1.00
0.00
40.0
2.00
.000
0.00
0
5.25
121
0.00
-0.1
19Luke Little
L. Little
40.0
2023
7
0
0
0
0.00
12
0
0
0
6.2
5
0
0
0
4
1
3
0
30
1
16.20
5.40
3.00
0.00
13.3
1.35
.385
0.00
0
1.90
44
6.75
1.8
20Jacob deGrom
J. deGrom
39.1
2023
6
2
0
1.000
6
2.67
45
0
0
0
30.1
19
9
11
2
4
0
0
0
115
1
13.35
1.19
11.25
0.59
3.5
0.76
.266
3.26
62
1.54
35
5.64
9.4
21Robert Stephenson
R. Stephenson
38.3
2023
TOT
60
3
4
.429
0
3.10
77
0
0
1
52.1
30
18
20
8
16
0
15
2
201
4
13.24
2.75
4.81
1.38
8.0
0.88
.220
3.44
73
3.21
76
5.16
6
22Devin Williams
D. Williams
37.7
2023
61
8
3
.727
0
1.53
87
0
0
36
58.2
26
10
13
4
28
1
49
1
231
1
13.35
4.30
3.11
0.61
12.1
0.92
.198
1.99
35
2.65
60
3.99
11.4
23Angel Perdomo
A. Perdomo
37.6
2023
30
3
2
.600
0
3.72
44
0
0
0
29.0
21
12
14
3
11
3
8
3
117
0
13.66
3.41
4.00
0.93
9.4
1.10
.321
4.34
83
3.01
69
6.52
4.4
24Prelander Berroa
P. Berroa
37.5
2023
2
0
0
0
0.00
3
0
0
0
1.2
0
0
0
0
3
0
0
0
8
1
16.20
16.20
1.00
0.00
37.5
1.80
.000
0.00
0
5.05
123
0.00
-0.2
25José Alvarado
J. Alvarado
37.2
2023
42
0
2
.000
0
1.74
64
0
0
10
41.1
30
8
15
3
18
0
12
1
172
3
13.94
3.92
3.56
0.65
10.5
1.16
.310
3.27
40
2.40
54
6.53
9.3

More MLB News

More Royals Stats

Team Batting Leaders

HR

7

Witt

Bobby Witt Jr.

RBI

23

Witt

Bobby Witt Jr.

AVG

.302

Witt

Bobby Witt Jr.
Team Pitching Leaders

W

4

Wacha

Michael Wacha

K

51

Bubic

Kris Bubic

ERA

2.83

Wacha

Michael Wacha
Team Rankings

HR

46

19th

R

190

25th

SO

400

14th

ERA

4.26

20th

2026 Division Standings
TEAMWLPCTGB
27
22
.551
24
23
.511
2.0
22
26
.458
4.5
20
28
.417
6.5
Royals Royals
20
28
.417
6.5
Schedule
DATEMATCHUPTIME (ET)
Tue
5/19
@
7:40 PM
Wed
5/20
@
7:40 PM
Fri
5/22
@
7:40 PM
Sat
5/23
@
4:10 PM
Sun
5/24
@
2:10 PM
Last Game
BOS Red Sox

20 - 27

3

Final

1

KCR Royals

20 - 28

Mon 18 May 2026

MLB 2026 Batting Leaders

MLB 2026 Pitching Leaders

MLB Fantasy 2026

MLB 2026 Betting

MLB 2026 Standings

NL EastWLPCTGB
32
16
.667
25
23
.521
7.0
23
25
.479
9.0
22
26
.458
10.0
21
26
.447
10.5
NL CentralWLPCTGB
29
19
.604
27
18
.600
0.5
27
19
.587
1.0
24
23
.511
4.5
24
24
.500
5.0
NL WestWLPCTGB
29
18
.617
29
19
.604
0.5
23
23
.500
5.5
20
28
.417
9.5
19
29
.396
10.5
AL EastWLPCTGB
31
15
.674
29
19
.604
3.0
21
26
.447
10.5
21
27
.438
11.0
20
27
.426
11.5
AL CentralWLPCTGB
27
22
.551
24
23
.511
2.0
22
26
.458
4.5
20
28
.417
6.5
20
28
.417
6.5
AL WestWLPCTGB
23
24
.489
23
26
.469
1.0
22
25
.468
1.0
19
30
.388
5.0
17
31
.354
6.5

MLB 2026 Scores & Schedule

Scores

DATEMATCHUPSCORE
Mon
5/4
@
4-2
Mon
5/4
@
5-4
Mon
5/4
@
1-5
Mon
5/4
@
1-0
Mon
5/4
@
1-12

Schedule

DATEMATCHUPTIME (ET)
Tue
5/19
@
4:10 PM
Tue
5/19
@
6:40 PM
Tue
5/19
@
6:40 PM
Tue
5/19
@
6:40 PM
Tue
5/19
@
6:45 PM