Killian underwent an MRI after exiting a Cactus League appearance Tuesday with right shoulder discomfort, Tony Andracki of Marquee Sports Network reports.

EDGE Analysis

The results of the MRI aren't yet in, but it's certainly a discouraging development for the young right-hander. If healthy, Killian is likely slated for a spot in the Triple-A Iowa rotation, though he could also be an option for the big-league club as a reliever.