Martinez left Sunday's Grapefruit League game after taking an elbow to the head while in the field, MASN Sports reports.
Martinez stayed down for a while before walking off under his own power. This has signs of being a concussion and we should no more within the next day or so. Martinez was trying to make the team as a non-roster invitee, but he was likely destined to begin the season at Double-A or Triple-A.