=== Dolphins' Miller suffers concussion ===
 
 Pittsburgh,  PA (SportsNetwork.com) - Miami Dolphins running back Lamar Miller
 left Sunday's game against Pittsburgh with a concussion.
 
 Miller  took a hard  hit late in the first half and did not return. He had six
 carries for 20 yards and two catches for 13 yards before exiting.
 
 The  Miami-Florida product,  in his second season, entered the contest leading
 the Dolphins with 547 rushing yards.
 
 12/08 15:23:54 ET