Guske went 6-8 with a 3.96 ERA in 15 games (14 starts) as a senior at Freed-Hardeman (Tenn.) University and was named a Pre-Season All-American. Guske finished with a team-high eight complete games, 102.1 innings and 86 strikeouts as a senior. Guske was a two-time American Midwest Conference Pitcher of the Year and First Team All-Conference selection. As a freshman in 2014, Guske was named the AMC Freshman Pitcher of the Year.