The 2017 season was one to forget for Junior Guerra. Instead of building on his historic #2016BrewersAce rookie campaign, Guerra injured himself while attempting to drop down a bunt in the third inning of his Opening Day start for the Brewers. He immediately hit the disabled list with a calf strain and missed the next seven weeks of action. He returned to active duty at the end of May but was never able to get on track during the rest of a lost season. He battled his mechanics, lost control of the strike zone, and suffered staggering fluctuations in his velocity.