My take: The Rams are taking the obvious and logical approach to the fourth round by adding help for Goff. They absolutely have to find weapons for Goff after their receiving corps combined for fewer yards than Atlanta's Julio Jones in 2015. Cooper might be a bit redundant with Tavon Austin in terms of size and skill set (not that he's as talented as Austin), but new passing game coach Mike Groh should be able to find ways to use him.
Where he fits: The Rams have a clear need for help in the slot. Stedman Bailey is still recovering from two gunshot wounds to the head. South Carolina used Cooper all over the field, much like the Rams do with Austin, but the Rams simply need weapons and can find a place for Cooper in their receiving corps.
Move down: The Rams traded pick No. 113 to the Chicago Bears for picks 117 and 206. They now have three choices in the sixth round.