But it took Sutton 23 years to do it..and along the way he lost 256 games. (+68)
Sutton's average year was 14-11.
Mussina's was 17-9. (+117)
And Sutton pitched his career in a pitcher's era in the NL and the days of the 4 man rotation. In fact, it took him 756 starts to win those 324 games (less than 43%).
Mussina pitched in a hitters (steroid) era, in the AL East, in the era of 5 man rotations and much greater bullpen reliance. He has a winning % of .638 (vs Sutton's .559) and Sutton won 54 more games, but it took 220 more starts.
As time goes on (post Randy Johnson)