Dolphins tight end Dustin Keller to miss season with knee injury

Keller was injured Saturday in a preseason game when he was hit in the knee by Houston's D.J. Swearinger, who said he avoided a high tackle that could draw a fine.Dustin Keller will miss the season with a knee injury that leaves the Miami Dolphins without much experience at tight end, a position in which they were counting on an upgrade to enliven their offense in 2013.