Mariners outfielder Julio Rodríguez was placed on the seven-day concussion injured list Friday after being hit in the back of the helmet by a throw during Thursday night's game against the Angels.
Rodríguez left Thursday's game in the third inning after being hit by the 78.2 mph throw during a double-play attempt on the bases two innings earlier.
Rodríguez went first-to-third on a Dominic Canzone grounder to Angels first baseman Nolan Schanuel, who attempted to start a 3-6-1 double play. But Schanuel’s throw hit Rodríguez directly off the back of his helmet, allowing Rodríguez to race into third.
After a brief celebration at third base, Rodríguez quickly fell into a crouch, at which point manager Dan Wilson and head athletic trainer Kyle Torgerson came out for a long visit. Rodríguez stayed in the game for the rest of the inning and then took his position in center field in the top of second. But after that inning concluded, he conferred further with Torgerson in the dugout, then left for the clubhouse and did not return.
Utilityman Miles Mastrobuoni was selected from Triple-A Tacoma and right-hander Cooper Criswell (right shoulder strain) was transferred to the 60-day injured list.