ALAMEDA, Calif. - Oakland Raiders running back Latavius Murray practiced Thursday for the first time since suffering a concussion and is optimistic about his chances of playing against Minnesota.

Four days after being forced out of a game in Pittsburgh following a powerful helmet-to-facemask hit by Steelers safety Mike Mitchell, Murray took part in position drills and showed no lingering effects while taking reps with Oakland's first-team offence during the 30-minute window for watching practice open to reporters.

It was the second concussion in less than a year for Murray, who leads the Raiders and is sixth overall with 630 rushing yards. He missed one game in 2014 after getting injured on Nov. 20 against Kansas City.

Rookie wide receiver Amari Cooper also practiced without limitations after sitting out Wednesday with a quadriceps injury.

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