Blackmon was removed from Friday's game against the Padres after getting hit in the head by a throw, Patrick Lyons of JustBaseball.com reports.
An errant throw from Xander Bogaerts connected with Blackmon's face as he was running toward first base in the third inning. The 38-year-old outfielder was able to walk off the field on his own, but he'll likely be evaluated for a concussion in the Rockies' clubhouse.