After spending his first two professional seasons primarily as a starter, Kivel made the transition to exclusively out of the bullpen during the 2015 season with Low-A Dayton. He returned to the level for a second season in 2016. Kivel was originally a 10th round pick by the Reds in 2012 out of high school. Though he has had high strikeout totals during his professional career, Kivel has seen his walk totals skyrocket since moving to the bullpen. He also allows nearly a hit per inning in his career, which leads to an elevated WHIP. Despite the struggles, Kivel still draws attention due to his mid-90s fastball.