O'Day (elbow) will throw a bullpen session Sunday, Eduardo A. Encina of The Baltimore Sun reports.

EDGE Analysis

O'Day was scheduled to start throwing last Tuesday but didn't end up getting the green light after receiving a cortisone injection the week prior. The 25-year-old has been sidelined with the elbow since May 6 and is seemingly getting closer to a return, although he still will likely require a minor-league rehab assignment.