It was 1990. 27-6 2.95 ERA 127/77 K/BB 238 IP for a 3.0 WAR season. Of course in 1990 27 wins would have gotten you the CY, but Clemens put up 10.0 WAR posting a 21-6 1.93 ERA 209/54 K/BB 228 IP. Most recent pitcher to win at least X games in a season: 32 Pete Alexander 1916 31 Denny McLain 1968 30 Denny McLain 1968 29 Denny McLain 1968 28 Denny McLain 1968 27 Bob Welch 1990 26 Bob Welch 1990 25 Bob Welch 1990 24 Justin Verlander 2011