Welcome back, Perrish Cox.
The 49ers signed their former cornerback today in advance of Sunday's game against the Packers. Jim Harbaugh said the 49ers, who had an open roster spot after Mario Manningham went on injured reserve on Friday, were planning to sign Cox no matter what happened in Sunday's finale in Arizona.
It turns out the most significant injury was to the team's most experienced cornerback, Carlos Rogers, who suffered a right hamstring strain on the Cardinals' final drive. After the game, Rogers said he didn't think the injury was serious, but he is getting an MRI today to assess the damage.
Rogers' absence would be a big storyline in the run-up to Sunday's game. He's the team's most veteran cornerback, is the leader of the group and he plays the critical nickel cornerback position when opponents move to three or four wide receivers. Harbaugh said that Eric Wright would fill in at nickel should Rogers miss the game. Presumably Tarell Brown and Tramaine Brock would be the outside cornerbacks.
If the 49ers needed a fourth cornerback, Cox would be available. He played 51 snaps -- his busiest game as a 49er -- against the Packers in the 2012 season opener, all of them when the 49ers were in their dime defense. The 49ers did not go to that formation as much this year against Green Bay - likely because the Packers have a better running attack this year - and he was in for 13 plays.
The 49ers released Cox on Nov. 12 to make room on the roster for rookie linebacker Nick Moody. He's been on and off Seattle's roster since then. The 49ers also considered signing receiver Chuck Jacobs off the practice squad.
-- Matt Barrows