New York Yankees: Who Had the Greatest Pitching Season in Team History?

Getting away from the Jeter Contract-a-Palooza nonsense, let's talk actual sports related stuff. Topic: Who had the greatest single pitching season in Yankee history (And by history, we mean from at least the 1920s). We didn't consider strike—or injury—shortened seasons. Here are some of the contestants.

Lefty Gomez—1937:
21-11, 2.33 ERA, 25 CG, 6 shutouts, 194 Ks, 193 ERA+, 1.171 WHIP

Mike Mussina—2001
17-11, 3.15 ERA, 4 CG, 3 shutouts, 214 Ks, 143 ERA+, 1.067 WHIP

Red Ruffing—1939
20-7, 2.93 ERA, 22 CG, 5 shutouts, 95 Ks, 150 ERA+, 1.226 WHIP

Catfish Hunter—1974
25-12, 2.49 ERA, 23 CG, 6 shutouts, 143 Ks, 134 ERA+, 0.986 WHIP

Sparky Lyle—1974
9-3, 1.66 ERA, 15 saves, 89 Ks in 114 IP, 215 ERA+, 1.193 WHIP

Whitey Ford—1958
14-7, 2.01 ERA, 15 CG, 7 shutouts, 145 Ks, 177 ERA+, 1.076 WHIP

Herb Pennock—1924
21-9, 2.83 ERA, 25 CG, 4 shutouts, 101 Ks, 148 ERA+, 1.278 WHIP

Andy Pettitte—1997
18-7, 2.88 ERA, 4 CG, 1 shutout, 166 Ks, 156 ERA+, 1.240 WHIP

Goose Gossage—1982
4-5, 2.23 ERA, 30 saves, 102 Ks in 93 IP, 179 ERA+, 0.978 WHIP

Allie Reynolds—1952
20-8, 2.06 ERA, 24 CG, 6 shutouts, 160 Ks, 162 ERA+, 1.191 WHIP

Waite Hoyt—1927
22-7, 2.63 ERA+, 23 CG, 3 shutouts, 60 Ks, 132 ERA+, 1.228 WHIP

Ron Guidry—1978
25-3, 1.74 ERA, 16 CG, 9 Shutouts, 248 Ks, 208 ERA+, 0.946 WHIP

Spud Chandler—1943
20-4, 1.64 ERA, 20 CG, 5 shutouts, 134 Ks, 198 ERA+, 0.992 WHIP

Mariano Rivera—2008
6-5, 1.40 ERA, 39 saves, 77 Ks in 70.2 IP, 319 ERA+, 0.665 WHIP

Or pick another season from anyone in Yankees' history. There are some great seasons in the batch above. When choosing, consider the times in which the pitcher pitched, and let me hear which season and which pitcher you picked.