Jen-Ho Tseng will make his MLB debut in the midst of a close pennant race. It was only a year ago that the 22-year-old finished a subpar season with the AA Tennessee Smokies in which he recorded a 4.29 ERA and 4.43 FIP while striking out 5.48 and walking and 2.54 batters per 9 innings, respectively.
Tseng learned from his first stint at AA, coming back strong to start 2017 by posting a 2.99 ERA and 3.28 FIP in 90.1 innings before being called up to AAA. On the brink of a call-up, he went on to register a 1.