Dustin Keller will miss the entire 2013 season with a gruesome knee injury.

Keller tore his ACL, MCL and PCL while also dislocating his knee.

Keller's leg bent unnaturally when he was tackled on the right knee by D.J. Swearinger.

Keller signed a one-year, $4.25 million contract with the Miami Dolphins in the offseason.