Packers cornerback Sam Shields appears close to being cleared to play at Arizona. Coach Mike McCarthy said before Thursday's practice that Shields is in the final stages of the concussion protocol. "The work today will obviously hopefully complete the protocol," McCarthy said. "But I don't have anything to announce until he completes the protocol." It's also a big day for left tackle David Bakhtiari (ankle). McCarthy said he hopes to increase Bakhtiari's workload.