Arrieta, of course, recently signed a multi-year deal with the Phillies. While he struggled at times in 2016 and 2017, he will always be remembered for his dominant 2015 season in which he won the Cy Young Award, just the fifth Cubs' pitcher to do so.
Arrieta's 2015 campaign approached Rick Sutcliffe territory in the sense that he dominated from the mid-point on. In 15 starts post-All Star break, he went 12-1 with a miniscule 0.75 ERA, an MLB record.
Sutcliffe, on the other hand, went 16-1 with a 2.69 ERA in 20 starts with the Cubs after they acquired him from the Indians in June 1984. His tremendous run with the Cubs helped him become the first pitcher to win the Cy Young after being traded during the season.
For the sake of comparison, here is how Arrieta's Cy Young season matches up with the four Cubs to win the award before him:
Jake Arrieta (2015): 33 starts, 229 innings pitched, 22-6 record, 1.77 ERA, 236 strikeouts, .185 BAA
Greg Maddux (1992): 35 starts, 268 innings pitched, 20-11 record, 2.18 ERA, 199 strikeouts, .210 BAA
Rick Sutcliffe (1984): 20 starts, 150 1/3 innings pitched, 16-1 record, 2.69 ERA, 155 strikeouts, .220 BAA. (Total: 35 starts, 244 2/3 innings pitched, 20-6 record, 3.64 ERA, 213 strikeouts, .251 BAA)
Bruce Sutter (1979): 62 games (no starts), 101 1/3 innings pitched, 37-for-47 in save opportunities, 110 strikeouts, .186 BAA
Fergie Jenkins (1971): 39 starts, 325 innings pitched, 24-13 record, 2.77 ERA, 263 strikeouts, .246 BAA
Ultimately, all five pitchers posted dominant campaigns en route to winning the award. While no Cub has won the Cy Young since Arrieta, Jon Lester and Kyle Hendricks finished second and third, respectively, in the 2016 voting.
With Lester, Hendricks, Yu Darvish, José Quintana and Tyler Chatwood, the Cubs' rotation in 2018 could rival the 2016 group that led the MLB with a 2.96 ERA.
If things go right, there is a good chance one of the aforementioned pitchers joins the list as the sixth Cub to win the Cy Young.