5 best single season performances by Chicago Cubs relievers in last decade

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Hector Rondon
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1. Hector Rondon 2015

The 2015 campaign marked a return to competition for the Chicago Cubs, and one of their big contributors that season was their underrated closer Hector Rondon. Over 70 innings pitched that year, Rondon put up a phenomenal ERA of 1.67, which ranked 5th among all qualified relievers that year. He also locked down 30 saves while striking out 69 with a minute WHIP of 1.00 to boot. He had many big appearances that season, perhaps none more electric than setting down Stephen Piscotty to send the Cubs to the NLCS.

Although the Cubs eventually traded for the flame-throwing Aroldis Chapman in 2016, Rondon played a pivotal role in the Cubs bullpen for half a decade.