The reason the Cleveland Indians were so great in 2016 was because each player on the roster stepped up in some fashion and helped contribute to the whole of the team. Zach McAllister did just that all season.
McAllister had a successful year out of the bullpen, appearing in 53 total games and finishing with an ERA of 3.44. 10 of his 20 earned runs came in a total three games, so he had 50 solid appearances in 2016.
As with most of the bullpen not named Miller, Allen, or Shaw, McAllister saw limited playing time in the postseason.