Morejon (elbow) will undergo an MRI this week, AJ Cassavell of MLB.com reports.
Morejon had to depart Sunday's Cactus League game versus the Athletics due to soreness above his elbow. Arm injuries are, unfortunately, nothing new for the left-hander, and he would appear likely to need another IL stint to begin the season even if he receives relatively good news from the MRI.