-- Will Blackmon returned to practice Wednesday, but Tramon Williams likely will be thrust into the nickel-back role in the NFC divisional playoff game against Seattle on Saturday.
Blackmon tested a right foot injury he aggravated in the regular-season finale Dec. 30 by participating in the jog-through portion of practice at the outset and then doing some individual drills off to the side before leaving for further treatment.
Head coach Mike McCarthy said the medical staff would wait to see how Blackmon's foot responded to the brief workout before clearing him for action Saturday.
If Blackmon is activated, he'll probably handle punt-return duties but perhaps nothing more.
"The return game is the biggest factor that I think he can contribute in the football game," McCarthy said. "Sub defenses is something you have to be concerned about because he hasn't taken the reps with (Tuesday's) and (Wednesday's) practice."
Williams, a first-year player, hasn't played much on defense this season, but he was given his first start in the final regular-season game and responded with his first interception and two pass breakups.
-- CB Charles Woodson was the only player absent from practice Wednesday. The veteran starter experienced some swelling in a knee after bumping it in practice Tuesday, but the injury won't keep him out of the game Saturday.
-- WR Greg Jennings was held out of the last portion of practice Wednesday after experiencing tightness in his groin. It's not cause for alarm with the team's touchdown leader, who is expected to be fine for the game.
-- WR James Jones, likewise, was sent off the field as a precautionary measure toward the end of Wednesday's practice after a hamstring tightened. The No. 3 receiver will be ready for Saturday.
-- RG Jason Spitz has gone through two straight days of practice without incident and is set to make the start this weekend. Spitz is coming back from a strained right quadriceps he suffered in the final regular-season game Dec. 30.
-- RB Brandon Jackson returned to practice Wednesday, a day after he was sent home because of flu-like symptoms.
-- QB Aaron Rodgers, who returned to practice last week, hasn't endured any lingering issues with a sore hamstring that made him unavailable for the final four regular-season games and will be Brett Favre's top backup Saturday.
-- WR Deion Branch is expected to return to the starting lineup this week, which means that Bobby Engram, the team's leading receiver, will return to the slot as the third receiver. Nate Burleson, who has nine TDs, will be the team's fourth receiver. It will be only the third time this season that Matt Hasselbeck has had all four of his options available at wide receiver.
-- DE Patrick Kerney did not practice on Wednesday. It was his second straight day of not practicing. He was not made available to the media. He is expected to play Saturday.
-- OT Walter Jones did not practice on Wednesday because of sore shoulders. He will play against the Packers.
-- DT Rocky Bernard did not practice because of a sore groin. He will play against Green Bay.
-- WR Deion Branch had limited participation in practice because of a calf injury but he said after practice that he is definitely playing Saturday.
-- LB Niko Koutouvides did not practice because of a knee injury but will play against the Packers on special teams.
-- S Mike Green did not practice because of a knee injury but is expected to play against the Packers.