Rumbelow allowed a run and four hits in one inning of work in Tuesday's spring training game.
Rumbelow made 17 appearances in the big leagues last season and will be vying for a spot in the bullpen throughout spring training. The suspension of Alrodis Chapman to begin the season could create the need for an extra reliever, but even still, Rumbelow will likely be limited to lower-leverage situations if he cracks the Opening Day roster.