The Rockies signed Justin Miller in November 2014 to shore up their bullpen. The first year of the pact went great. Miller struck out 10.26 batters per nine innings in 33.1 innings of work in 2015. His 94 mph fastball from the right side didn’t stand out in terms of velocity, but he coupled it with a nice slider that generated a lot of swings and misses. Heading into 2016, he was a candidate to get late inning work in the Rockies bullpen.
Maybe it was relievers being relievers. Maybe 2015 was smoke and mirrors. Maybe he just got worse.