Single-Season Pitcher PIV Records

Includes the 2026 season through September 25, 2026

As of September 25, 2026, the single-season leader in Pitcher PIV is Pedro Martinez (1999) with 18,448. Randy Johnson (2001) is second with 15,025 and Roger Clemens (1997) is third with 14,892. This page ranks the top 100 seasons in Pitcher PIV.

Pitcher PIV (Pitcher Player Impact Value):
The pitching counterpart to PIV: run prevention relative to the league average of the pitcher's own era, adjusted for workload.
ERA (Earned Run Average):
Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
IP (Innings Pitched):
Outs recorded divided by three; ".1" and ".2" mean one and two extra outs.

Data updated

PIV is computed through the 2025 season, so it does not yet include 2026. Career totals elsewhere on the site include 2026 to date.

About Single-Season Pitcher PIV

Pitcher PIV measures pitching dominance by combining FIP-based performance with workload: Pitcher PIV = (lgFIP − FIP) × IP × 25 × [1.0 + (IP/TeamIP) × 0.3]. The single-season leaderboard is restricted to the Modern Era (1901+), since pre-1901 workloads and rules make those seasons incomparable. Read the full methodology →

The 100 most dominant individual pitching seasons ever, ranked by single-year Pitcher PIV. Want the best whole careers instead? See the career Pitcher PIV leaders.

Top 10 Single-Season Pitcher PIV

Most dominant pitching seasons. Click to view the player.

Single-Season Pitcher PIV Records — About Single-Season Pitcher PIV
Rank Player Year Team Pitcher PIV Games GS IP FIP
1 Pedro Martinez 1999 BOS 18,448 31 29 213.1 1.46
2 Randy Johnson 2001 ARI 15,025 35 34 249.2 2.28
3 Roger Clemens 1997 TOR 14,892 34 34 264.0 2.34
4 Kevin Brown 1998 SDN 14,876 36 35 257.0 2.29
5 Pedro Martinez 2000 BOS 14,726 29 29 217.0 2.24
6 Randy Johnson 2000 ARI 14,602 35 35 248.2 2.60
7 Sandy Koufax 1965 LAN 14,098 43 41 335.2 2.61
8 Randy Johnson 2004 ARI 13,965 35 35 245.2 2.45
9 Randy Johnson 1999 ARI 13,957 35 35 271.2 2.83
10 J. R. Richard 1979 HOU 13,920 38 38 292.1 2.67
11 Walter Johnson 1910 WS1 13,806 45 42 370.0 2.26
12 Sandy Koufax 1963 LAN 13,293 40 40 311.0 2.57
13 Randy Johnson 1995 SEA 13,257 30 30 214.1 2.18
14 Walter Johnson 1912 WS1 13,229 50 37 369.0 2.38
15 Mike Scott 1986 HOU 13,203 37 37 275.1 2.59
16 John Smoltz 1996 ATL 13,129 35 35 253.2 2.67
17 Dwight Gooden 1985 NYN 12,909 35 35 276.2 2.64
18 Curt Schilling 2002 ARI 12,858 36 35 259.1 2.63
19 Pedro Martinez 1997 MON 12,674 31 31 241.1 2.48
20 Sandy Koufax 1966 LAN 12,478 41 41 323.0 2.72
21 Bob Gibson 1970 SLN 12,454 34 34 294.0 2.85
22 Lefty Grove 1930 PHA 12,385 50 32 291.0 2.79
23 Bob Feller 1946 CLE 12,371 48 42 371.1 2.97
24 Bert Blyleven 1973 MIN 12,365 40 40 325.0 2.95
25 Ed Walsh 1908 CHA 12,270 66 49 464.0 2.52
26 Jacob deGrom 2018 NYN 12,260 32 32 217.0 2.02
27 Dwight Gooden 1984 NYN 12,103 31 31 218.0 2.12
28 Greg Maddux 1996 ATL 12,097 35 35 245.0 2.76
29 Clayton Kershaw 2015 LAN 12,014 33 33 232.2 2.06
30 Greg Maddux 1995 ATL 11,985 28 28 209.2 2.36
31 Greg Maddux 1997 ATL 11,969 33 33 232.2 2.52
32 Zack Greinke 2009 KCA 11,960 33 33 229.1 2.43
33 Curt Schilling 1997 PHI 11,828 35 35 254.1 2.71
34 Curt Schilling 1998 PHI 11,799 35 35 268.2 2.83
35 Ed Walsh 1911 CHA 11,749 56 37 368.2 2.60
36 Tim Lincecum 2009 SFN 11,666 32 32 225.1 2.45
37 Tom Seaver 1971 NYN 11,658 36 35 286.1 2.68
38 Steve Carlton 1972 PHI 11,639 41 41 346.1 2.81
39 Christy Mathewson 1908 NY1 11,565 56 44 390.2 2.39
40 Steve Carlton 1980 PHI 11,481 38 38 304.0 2.87
41 Corbin Burnes 2021 MIL 11,377 28 28 167.0 1.66
42 Steve Carlton 1982 PHI 11,376 38 38 295.2 2.90
43 Ed Walsh 1910 CHA 11,353 45 36 369.2 2.51
44 Ben Sheets 2004 MIL 11,286 34 34 237.0 2.80
45 Rube Waddell 1904 PHA 11,191 46 46 383.0 2.37
46 Greg Maddux 1994 ATL 11,142 25 25 202.0 2.46
47 Hal Newhouser 1946 DET 11,085 37 34 292.2 2.78
48 Randy Johnson 2002 ARI 11,066 35 35 260.0 2.90
49 Bob Gibson 1969 SLN 11,012 35 35 314.0 2.99
50 Roger Clemens 1998 TOR 10,936 33 33 234.2 2.71
51 Pete Alexander 1915 PHI 10,933 49 42 376.1 2.61
52 Nolan Ryan 1973 CAL 10,932 41 39 326.0 3.12
53 Dazzy Vance 1924 BRO 10,853 35 34 308.1 2.80
54 Roger Clemens 1988 BOS 10,851 35 35 264.0 2.61
55 Ron Guidry 1978 NYA 10,817 35 35 273.2 2.81
56 Rube Waddell 1903 PHA 10,789 39 38 324.0 2.32
57 Greg Maddux 1998 ATL 10,711 34 34 251.0 2.87
58 Roy Halladay 2011 PHI 10,672 32 32 233.2 2.37
59 Chris Sale 2017 BOS 10,657 32 32 214.1 2.50
60 Walter Johnson 1913 WS1 10,622 48 36 346.0 2.54
61 Mark Prior 2003 CHN 10,621 30 30 211.1 2.64
62 Pedro Martinez 2003 BOS 10,602 29 29 186.2 2.38
63 Pedro Martinez 2002 BOS 10,575 30 30 199.1 2.48
64 Vida Blue 1971 OAK 10,548 39 39 312.0 2.95
65 Kevin Brown 1996 FLO 10,541 32 32 233.0 2.91
66 Van Mungo 1936 BRO 10,463 45 37 311.2 3.17
67 Tom Seaver 1970 NYN 10,455 37 36 290.2 3.09
68 Kevin Brown 1999 LAN 10,369 35 35 252.1 3.21
69 Gerrit Cole 2019 HOU 10,336 33 33 212.1 2.63
70 Roger Clemens 1987 BOS 10,306 36 36 281.2 3.24
71 Smoky Joe Wood 1912 BOS 10,226 43 38 344.0 2.60
72 Sam McDowell 1965 CLE 10,218 42 35 273.0 2.76
73 Tim Lincecum 2008 SFN 10,141 34 33 227.0 2.68
74 Greg Maddux 2000 ATL 10,112 35 35 249.1 3.29
75 Tom Seaver 1975 NYN 10,100 36 36 280.1 2.96
76 Nolan Ryan 1987 HOU 10,073 34 34 211.2 2.80
77 Roger Clemens 1990 BOS 10,062 31 31 228.1 2.57
78 Carl Hubbell 1933 NY1 10,019 45 33 308.2 2.93
79 Sam McDowell 1969 CLE 9,970 39 38 285.0 2.98
80 Clayton Kershaw 2014 LAN 9,957 27 27 198.1 1.88
81 Bob Feller 1940 CLE 9,933 43 37 320.1 3.25
82 Harry Brecheen 1948 SLN 9,908 33 30 233.1 2.91
83 Corey Kluber 2017 CLE 9,858 29 29 203.2 2.54
84 Mario Soto 1982 CIN 9,777 35 34 257.2 2.91
85 Bob Gibson 1968 SLN 9,773 34 34 304.2 2.59
86 Bob Veale 1965 PIT 9,759 39 37 266.0 2.79
87 Jacob deGrom 2019 NYN 9,726 32 32 204.0 2.66
88 Cy Young 1905 BOS 9,725 38 33 320.2 2.37
89 Cy Blanton 1935 PIT 9,712 35 31 254.1 2.91
90 Juan Marichal 1969 SFN 9,712 37 36 299.2 3.08
91 Jake Arrieta 2015 CHN 9,675 33 33 229.0 2.41
92 Kevin Brown 2000 LAN 9,613 33 33 230.0 3.24
93 Dennis Leonard 1977 KCA 9,592 38 37 292.2 3.22
94 Roger Clemens 1991 BOS 9,592 35 35 271.1 2.92
95 Justin Verlander 2009 DET 9,574 35 35 240.0 2.90
96 Dazzy Vance 1925 BRO 9,570 31 31 265.1 2.79
97 Don Drysdale 1964 LAN 9,555 40 40 321.1 3.06
98 Jake Peavy 2007 SDN 9,531 34 34 223.1 2.80
99 Jason Schmidt 2003 SFN 9,518 29 29 207.2 2.81
100 Robin Roberts 1953 PHI 9,487 44 41 346.2 3.73

Reading the single-season Pitcher PIV board

The board ends at rank 100 with Robin Roberts at 9,487 in 1953. More than one season makes the list for Pedro Martinez (1999, 2000, 1997, 2003, and 2002), Randy Johnson (2001, 2000, 2004, 1999, and 1995), and Roger Clemens (1997, 1998, 1988, 1987, and 1990). The team code seen most often in the Team column is BOS. Pedro Martinez leads at 18,448 in 1999. Randy Johnson is next at 15,025 in 2001.

Frequently Asked Questions

Who has the highest single-season Pitcher PIV (1901 onward)?
Pedro Martinez — 18,448 Pitcher PIV in 1999, among qualifying seasons (1901 onward). Next are Randy Johnson (15,025 in 2001) and Roger Clemens (14,892 in 1997).
What was Pedro Martinez's Pitcher PIV in 1999?
Pedro Martinez accumulated 18,448 Pitcher PIV for BOS in 1999 — the highest mark on this leaderboard.
Who else ranks in the top 5 for single-season Pitcher PIV?
1. Pedro Martinez (18,448 in 1999); 2. Randy Johnson (15,025 in 2001); 3. Roger Clemens (14,892 in 1997); 4. Kevin Brown (14,876 in 1998); 5. Pedro Martinez (14,726 in 2000).
Who qualifies for this Pitcher PIV leaderboard?
This leaderboard ranks qualifying seasons (1901 onward), showing the top 100. Pedro Martinez leads with 18,448 Pitcher PIV in 1999.