Nolan Ryan has allowed the fewest H/9 with 162.0+ innings pitched in a season, with 5.26 per nine innings in 1972.

lowest h/9 in a season by a pitcher with 162+ ip
1972 Ryan 1968 Tiant 1991 Ryan 2000 Martinez 1906 Reulbach 2019 Verlander 1914 Leonard 2018 Snell 2017 Scherzer 1907 Lundgren 1985 Fernandez 1949 Byrne 2023 Snell 1968 McNally 2013 Fernandez 1965 Koufax 1910 Ford 1995 Nomo 1963 Downing 1956 Score 1968 Gibson 1965 McDowell 1910 Walsh 1997 Martinez 2015 Arrieta 2022 Gallen 1986 Scott 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 5.26 5.30 5.31 5.31 5.33 5.53 5.57 5.58 5.65 5.65 5.71 5.74 5.75 5.77 5.79 5.79 5.83 5.83 5.84 5.85 5.85 5.87 5.89 5.89 5.90 5.92 5.95
NAME SEASON TM G H/9 IP W L W% GS CG GF SHO SV H TBF R ER HR BB IBB HBP SO WP ERA WHIP K/9 BB/9 K/BB ERA- FIP FIP- PRAA
Nolan Ryan illustration Nolan Ryan
1972
CAL logo CAL
39 5.26 284.0 19 16 .543 39 20 0 9 0 166 1,154 80 72 14 157 4 10 329 18 2.28 1.14 10.43 4.98 2.10 79 2.48 83 16.6
Luis Tiant illustration Luis Tiant
1968
CLE logo CLE
34 5.30 258.1 21 9 .700 32 19 0 9 0 152 987 53 46 16 73 4 4 264 3 1.60 0.87 9.20 2.54 3.62 53 2.04 64 33
Nolan Ryan illustration Nolan Ryan
1991
TEX logo TEX
27 5.31 173.0 12 6 .667 27 2 0 2 0 102 683 58 56 12 72 0 5 203 8 2.91 1.01 10.56 3.75 2.82 72 2.74 68 24.4
Pedro Martinez illustration Pedro Martinez
2000
BOS logo BOS
29 5.31 217.0 18 6 .750 29 7 0 4 0 128 817 44 42 17 32 0 14 284 1 1.74 0.74 11.78 1.33 8.88 35 2.16 47 61.5
Ed Reulbach illustration Ed Reulbach
1906
CHC logo CHC
33 5.33 218.0 19 4 .826 24 20 9 6 3 129 842 51 40 2 92 13 94 3 1.65 1.01 3.88 3.80 1.02 62 3.07 111 -7.2
Justin Verlander illustration Justin Verlander
2019
HOU logo HOU
34 5.53 223.0 21 6 .778 34 2 0 1 0 137 847 66 64 36 42 0 6 300 4 2.58 0.80 12.11 1.70 7.14 58 3.26 73 30.6
Dutch Leonard illustration Dutch Leonard
1914
BSA logo BSA
36 5.57 224.2 19 5 .792 25 17 8 7 3 139 842 34 24 3 60 8 176 2 0.96 0.89 7.05 2.40 2.93 36 1.95 70 20.4
Blake Snell illustration Blake Snell
2018
TBR logo TBR
31 5.58 180.2 21 5 .808 31 0 0 0 0 112 700 41 38 16 64 2 1 221 13 1.89 0.97 11.01 3.19 3.45 46 2.94 72 23.1
Max Scherzer illustration Max Scherzer
2017
WSH logo WSH
31 5.65 200.2 16 6 .727 31 2 0 0 0 126 780 62 56 22 55 2 11 268 4 2.51 0.90 12.02 2.47 4.87 57 2.88 66 33.2
Carl Lundgren illustration Carl Lundgren
1907
CHC logo CHC
28 5.65 207.0 18 7 .720 25 21 3 7 0 130 795 42 27 0 92 2 84 2 1.17 1.07 3.65 4.00 0.91 48 2.73 104 -2.3
Sid Fernandez illustration Sid Fernandez
1985
NYM logo NYM
26 5.71 170.1 9 9 .500 26 3 0 0 0 108 685 56 53 14 80 3 2 180 3 2.80 1.10 9.51 4.23 2.25 80 3.08 86 9.6
Tommy Byrne illustration Tommy Byrne
1949
NYY logo NYY
32 5.74 196.0 15 7 .682 30 12 2 3 0 125 880 84 81 11 179 13 129 4 3.72 1.55 5.92 8.22 0.72 92 4.86 120 -19
Blake Snell illustration Blake Snell
2023
SDP logo SDP
32 5.75 180.0 14 9 .609 32 0 0 0 0 115 742 47 45 15 99 0 3 234 13 2.25 1.19 11.70 4.95 2.36 53 3.44 79 18
Dave McNally illustration Dave McNally
1968
BAL logo BAL
35 5.77 273.0 22 10 .688 35 18 0 5 0 175 1,038 67 59 24 55 1 10 202 5 1.95 0.84 6.66 1.81 3.67 67 2.76 90 9.5
Jose Fernandez illustration Jose Fernandez
2013
MIA logo MIA
28 5.79 172.2 12 6 .667 28 0 0 0 0 111 681 47 42 10 58 5 5 187 3 2.19 0.98 9.75 3.02 3.22 60 2.72 75 18.1
Sandy Koufax illustration Sandy Koufax
1965
LAD logo LAD
43 5.79 335.2 26 8 .765 41 27 2 8 2 216 1,297 90 76 26 71 4 5 382 11 2.04 0.86 10.24 1.90 5.38 63 1.93 61 47.9
Russ Ford illustration Russ Ford
1910
NYH logo NYH
36 5.83 299.2 26 6 .813 33 29 3 8 1 194 1,112 69 55 4 70 8 209 5 1.65 0.88 6.28 2.10 2.99 63 1.88 69 28.3
Hideo Nomo illustration Hideo Nomo
1995
LAD logo LAD
28 5.83 191.1 13 6 .684 28 4 0 3 0 124 780 63 54 14 78 2 5 236 19 2.54 1.06 11.10 3.67 3.03 65 2.88 71 26.1
Al Downing illustration Al Downing
1963
NYY logo NYY
24 5.84 175.2 13 5 .722 22 10 2 4 0 114 707 52 50 7 80 1 0 171 5 2.56 1.10 8.76 4.10 2.14 73 2.42 68 22.3
Herb Score illustration Herb Score
1956
CLE logo CLE
35 5.85 249.1 20 9 .690 33 16 1 5 0 162 1,022 82 70 18 129 2 2 263 11 2.53 1.17 9.49 4.66 2.04 61 2.77 69 34.6
Bob Gibson illustration Bob Gibson
1968
STL logo STL
34 5.85 304.2 22 9 .710 34 28 0 13 0 198 1,161 49 38 11 62 6 7 268 4 1.12 0.85 7.92 1.83 4.32 38 1.77 63 34.8
Sam McDowell illustration Sam McDowell
1965
CLE logo CLE
42 5.87 273.0 17 11 .607 35 14 5 3 4 178 1,116 80 66 9 132 7 6 325 17 2.18 1.14 10.71 4.35 2.46 63 2.08 58 45.4
Ed Walsh illustration Ed Walsh
1910
CWS logo CWS
45 5.89 369.2 18 20 .474 36 33 7 7 5 242 1,359 87 52 5 61 4 258 6 1.27 0.82 6.28 1.49 4.23 52 1.63 66 34.8
Pedro Martinez illustration Pedro Martinez
1997
MON logo MON
31 5.89 241.1 17 8 .680 31 13 0 4 0 158 947 65 51 16 67 5 9 305 3 1.90 0.93 11.37 2.50 4.55 45 2.38 57 49
Jake Arrieta illustration Jake Arrieta
2015
CHC logo CHC
33 5.90 229.0 22 6 .786 33 4 0 3 0 150 870 52 45 10 48 2 6 236 6 1.77 0.86 9.28 1.89 4.92 45 2.34 60 39

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