Trent Richardson midseason trade unusual but not unprecedented

Big NFL deals like Cleveland's trade of the running back to Indianapolis have been done before. Two L.A. teams in the 1980s were involved in such swaps.Making a trade during the NFL season is relatively uncommon, and those moves are even more rare when they involve star players. So the Cleveland Browns raised a lot of eyebrows Wednesday in dealing running back Trent Richardson to Indianapolis for a 2014 first-round pick.