(AP) — 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 offense during the 30-minute window for watching practice open to reporters. A sixth-round pick in 2013, Murray has helped revive the Raiders running game after they finished last in the NFL last season. While it appears Murray will be good to go against Minnesota, offensive coordinator Bill Musgrave said the Raiders have been giving the other running backs additional work in practice this week. Rookie wide receiver Amari Cooper also practiced without limitations after sitting out Wednesday with a quadriceps injury in a precautionary move. Cooper, who leads all rookies in catches and receiving yardage, looked fine as he sprinted downfield and hauled in a long pass from quarterback Derek Carr.