Raiders WR Murphy sidelined by concussion, sits out practice

Oakland Raiders wide receiver Louis Murphy was held out of training-camp practice Saturday with a concussion.

Murphy said he was hurt when he was kneed in the helmet by teammate Nnamdi Asomugha during practice Friday. Murphy had a bad headache and missed practice Saturday.

Raiders coach Tom Cable said Murphy will not return until he passes a series of tests that shows he has recovered. Murphy said he hasn't previously had a concussion.

Murphy is being counted on heavily in his second year in the NFL. He led all Raiders wideouts with 34 catches for 521 yards and four touchdowns as a rookie last season.

Wide receiver Chaz Schilens also sat out practice Saturday with a sore left foot, according to the *San Francisco Chronicle*.

According to Cable, Schilens is "improving, just want to continue, just want to not have any soreness."

Schilens' foot was operated on twice in the past year. The third-year pro has appeared in 24 games for the Raiders with 44 receptions for 591 yards and four touchdowns.

The Associated Press contributed to this report.