The Miami Dolphins made it official on Tuesday and placed tight end Dustin Keller on injured reserve.

Keller suffered a devastating right knee injury during Saturday's preseason game against Houston when he took a helmet-to-knee hit from Texans safety D.J. Swearinger.

The Dolphins didn't disclose the exact injury in the team's release on Tuesday, but numerous media outlets on Sunday had said Keller suffered a torn ACL, PCL and MCL as well as a dislocated kneecap.

As Keller tried to make a grab midway through the second quarter on Saturday, Swearinger dove in low to break up the play and made direct contact with his helmet against Keller's right knee.

Keller remained on the ground in obvious pain before being carted to the locker room.

The 28-year-old Purdue product signed a one-year deal in the offseason after spending his first five seasons with the New York Jets. He didn't miss a regular-season game over his first four years in the league before injuries limited him to eight contests last season.

Keller has 241 catches for 2,876 yards and 17 touchdowns in 72 NFL games.

The Dolphins filled the vacant roster spot by signing linebacker Nathan Williams, a rookie out of Ohio State.