Dustin Keller is done for the season after suffering a knee injury in Saturday night's preseason game against the Texans. The exact nature of Keller's injury is unknown at the moment, but he likely tore at least one of the major ligaments in his knee. It's a tough blow for both Keller and the Dolphins. Keller was legitimately excited for a bounce-back season after hamstring issues ruined his 2012 campaign. Signed to a one-year, $4.25 million deal, Keller had plans to rehab his value and land a multi-year contract next March. Instead, he'll have to again settle for a one-year pact.