The greatest Chicago Cubs pitcher of all time is Fergie Jenkins. He was so good that you would have to consider him to be Chicago royalty for the rest of time. On Friday, he was honored with a statue revealed outside of Wrigley Field before their game against the Arizona Diamondbacks.
Jenkins had a career that spanned from 1965-1983. Some of the best years (10 of them) were spent with the Chicago Cubs. He also spent time with the Texas Rangers, Philadelphia Phillies, and Boston Red Sox. Throughout his career, he was dominant.