10. Junior Guerra
Acquired off waivers from White Sox (October 2015)
This one was noteworthy since this was the first official move made by David Stearns for the Milwaukee Brewers. Junior Guerra has had a roller coaster of a ride since breaking through as a 31-year old rookie in 2016. He went 9-3 with a 2.81 ERA in 20 starts that earned him the Opening Day starting assignment in 2017. He was injured running to first base and did not live up to the lofty expectations he set for himself last season.
After not making the initial roster, Guerra has been a stabilizing force in the Brewers starting rotation in 2018. He was recalled quickly on April 11th and has made 18 starts. His ERA was under 3.00 for the majority of the season until a disastrous start against the Pirates going into the break. He gave up 9 hits and 6 runs in 4 innings, which made his ERA balloon by 44 points to 3.23.
There have been many injuries to the starting rotation affecting the Brewers 2018 season. It is pretty clear they would likely be much worse off if Guerra had not reclaimed his form from 2016. The waiver claim was not a blockbuster move at the time, but it has held up to being one of Stearns’ better moves.