BBAO: Surgery Friday for Adrian Peterson

We're Black and Blue All Over:

Minnesota Vikings tailback Adrian Peterson convinced Dr. James Andrews to perform a quicker-than-normal surgery on his injured left knee because he has been in "severe" pain, according to Tim Yotter of Viking Update, and wanted to get the rehabilitation process started as soon as possible.

Peterson will have surgery Friday, six days after tearing two ligaments and suffering other damage in the knee. Typically, doctors prefer patients to wait until swelling has reduced, but that was not the case in this instance.

The Vikings have set a goal of getting Peterson back for the start of the 2012 season, a timetable that probably represents a best-case scenario.

Continuing around the NFC North:

  • The Vikings need a victory Sunday to avoid going winless in the NFC North, a sign of how much work they have ahead of them, notes Tom Pelissero of 1500ESPN.com.

  • The Vikings are investigating a number of stadium sites in downtown Minneapolis, according to Mike Kaszuba of the Star Tribune.

  • Brian Murphy of the St. Paul Pioneer Press profiles retiring tight end Jim Kleinsasser.

  • Sunday could be a chance to change the career of Green Bay Packers quarterback Matt Flynn, writes Tyler Dunne of the Milwaukee Journal Sentinel.

  • Pete Dougherty of the Green Bay Press-Gazette: "It looks like Chad Clifton will get every chance in the next week and a half to move back into the Green Bay Packers’ starting job at left tackle for the playoffs after missing the last 2 months because of hamstring and back injuries."

  • The Packers are still rotating players at right outside linebacker, notes Jason Wilde of ESPNMilwaukee.com.

  • Detroit Lions quarterback Matthew Stafford knows he will be judged by how he plays in the playoffs. Mike O'Hara of the Detroit News explains.

  • Lions offensive coordinator Scott Linehan has resurrected his career over the past few years, writes Dave Birkett of the Detroit Free Press.

  • Pro Bowl special-teams ace Corey Graham wants to play defense for the Chicago Bears, writes Vaughn McClure of the Chicago Tribune.

  • Dan Pompei of the Chicago Tribune thinks the Bears are making a mistake if they don't use rookie quarterback Nathan Enderle extensively Sunday against the Vikings. Pompei: "You can't shove a young quarterback in the back of a freezer until you need him and then expect him to be microwave ready at a moment's notice. Getting a young quarterback ready to play is a process that should be deliberate and calculated."

  • Bears linebacker Lance Briggs didn't bite on a question about his request for a new contract, according to Michael C. Wright of ESPNChicago.com.