AL Comeback Player of the Year — Dallas Keuchel
It helps that Keuchel is set up perfectly for this award. He had two great years, capped off by a Cy Young Award in 2015, then a bad 2016. A full healthy season and a return to form would easily make Keuchel one of the frontrunners. He may already be the odds-on favorite.
Regardless, he will not need to match his 2015 results (157 ERA+) to win the award. All he has to do is post similar statistics to his 2014 season (132 ERA+).