Houston Texans receiver Andre Johnson says he'll miss a week or so after a minor groin injury in the team's second morning practice.
Johnson fell awkwardly running a route on Sunday morning and had an MRI exam later in the day that showed a "mild strain."
Johnson missed nine regular-season games last season with hamstring injuries and was sidelined from the first organized team activities in the spring after arthroscopic surgery on his left knee.
Coach Gary Kubiak said Johnson wanted to continue practicing, but Kubiak took the cautious route. Johnson watched the rest of the outdoor half of the workout with a towel wrapped around his head then went to Reliant Stadium when the practice moved indoors.
In other camp news:
Basketball Hall of Fame center David Robinson attended Sunday morning's session as a guest of Texans running backs coach Chick Harris. Robinson chatted with LB Brian Cushing and Kubiak and posed for pictures with several players.
Kubiak says cornerback Kareem Jackson hurt his left hamstring on Sunday and will probably skip Monday's workouts.
Kubiak says linebacker Darryl Sharpton had a setback in his recovery from a right torn quadriceps injury. Sharpton went on injured reserve late in 2010 with a shoulder injury. He backed up DeMeco Ryans last season before hurting his quad and getting carted off the field in an October game against Jacksonville.