Dustin Keller injury: Tight end placed on IR, Dolphins sign LB Nathan Williams

In a move everyone knew was coming, the Miami Dolphins have officially ended tight end Dustin Keller's season by placing him on Injured Reserve.  The move comes after Keller, during the Dolphins 24-17 loss to the Houston Texans Saturdaynight, suffered a catastrophic knee injury, tearing three of the four ligaments in his knee.  The injury is comparable to the knee injury San Francisco 49ers running back Marcus Lattimore suffered during his final season at South Carolina.

Miami filled Keller's roster spot by signing linebacker Nathan Williams.  Williams signed with the Minnesota Vikings as an undrafted free agent out of Ohio State this year, but was placed on the Physically Unable to Perform list.  He had offseason surgery on his ankle and, while he was making progress in rehabbing the ankle, the Vikings released Williams earlier this month.

As a senior Williams played in 10 games for Ohio State, recording 39 tackles, 3.5 for a loss, with two sacks and a forced fumble.  He is a defensive end/linebacker tweener at 6'3", 241 pounds.  He ran a 4.88 40-yard dash and bench pressed 225 pounds 24 times.  He does, however, have injury concerns, missing most of the 2011 season with a knee injury, as well as the ankle problems he is rehabbing now.

More Dolphins Coverage:

• Smith may miss time for helmet swing at Incognito
• Dolphins position battle review after Texans game
• Who will step up in Dustin Keller's absence?
• Keller: "I'm going to come back stronger, faster and better."
• Swearinger says NFL rules made him hit Keller low
• Keller tears three ligaments, dislocates knee