The Phillies made the move Thursday. Brown hit his head on the ground diving for Carlos Beltran's triple in the seventh inning of Tuesday night's 4-1 loss at St. Louis.
Brown underwent a concussion test on Wednesday. He leads the Phillies with 24 homers and 69 RBIs. He has started 97 games and is hitting .271.
The Phillies called up outfielder Steve Susdorf to take Brown's place on the roster. Susdorf was batting .335 with one homer and 25 RBI for Triple-A Lehigh Valley, and was in uniform for Thursday night's game against the Cardinals.