19.2 WAR (7th)
3.24 xFIP (2nd)
3.36 SIERA (2nd)

The 2015 Chicago Cubs benefited greatly from Jake Arrieta, who put together one of the best single-season pitching performances of all time. Arrieta threw 229 innings and went 22-6 with a minuscule 1.77 ERA. He also owned just a 0.87 WHIP and a 219 ERA+ while posting 8.7 WAR for the season.

Jon Lester was the second man up in the Chicago rotation, and he put together a solid season, his first in Chicago. Lester threw 205 innings over 32 starts and finished the year with 3.1 Wins Above Replacement, a 2.92 FIP, and a 116 ERA+.

The two players filling in the middle of the Cubs’ 2015 rotation, Kyle Hendricks and Jason Hammel, had remarkably similar seasons.

Hendricks logged 180 innings with a 1.16 WHIP and a 3.36 FIP while Hammel threw 170.2 innings, with a 1.16 WHIP and a 3.68 FIP. Both pitchers finished the season with 1.8 WAR each.

Like the 2012 Tigers and 2008 D-Backs, last year’s Cubs team had a few different pitchers make starts as a fifth starter throughout the year.

Chicago acquired Dan Haren at the trade deadline last year, and he made 11 starts, posting a 97 ERA+. Tsuyoshi Wada also made seven starts for the Cubbies, with a 108 ERA+. They combined for 0.6 WAR over just 90.2 innings pitched.