Trent Richardson underwent shoulder surgery after the Indianapolis Colts were eliminated fro the playoffs.

Richardson rushed for just 2.9 yards per carry in the regular season and he also had a fumble in the Wildcard round against the Kansas City Chiefs.

Richardson was active for all 16 games and wasn't ever listed on the injury report with a shoulder issue.

The Miami Dolphins want Lamar Miller to be a more physical running back in 2014.

The Dolphins were disappointed by the production of Miller and Daniel Thomas last season.

"They're a good complement to each other, and we like Miller's speed and explosiveness," one Dolphins staffer said. "Miller has the higher ceiling, but you wish he ran with a more physical (style). And both have to improve as blockers."

Miller was one of the NFL's least elusive running backs last season.

Demaryius Thomas suffered a separated shoulder in the first quarter of the Super Bowl.

The injury may have occurred when Thomas was hit by Kam Chancellor on his first catch of the game. Thomas caught 13 balls in the game, which was a Super Bowl record.

Thomas also fumbled after a catch in the third quarter.