Fergie Jenkins: 1971
Cubs legend Fergie Jenkins secured the very first Cy Young award in Cubs history in 1971. This was back when relief pitchers were used much less often, and pitchers regularly went the distance.
Even by the standards of the day, Jenkins' 30 complete games in 1971 was still a remarkable accomplishment and one that has only been replicated twice since. Jenkins also led the league in wins (24) games started (39) and innings pitched (325) with a 2.77 ERA.
Jenkins' uniform number was also 31, and it was retired in 2009 alongside Greg Maddux. His other accolades include 3 All-Star appearances, the NL strikeouts leader in 1969, and induction into the National Baseball Hall of Fame in 1991.