Green Bay’s weekly turnover on the offensive line has been a regular focus of this blog, and it looks like there is at least a possibility of another change this week against San Francisco.

Center Scott Wells reported concussion symptoms this week and was held out of practice Thursday. With center Jason Spitz already on injured reserve, the Packers would be left with undrafted rookie Evan Dietrich-Smith against the 49ers. Coach Mike McCarthy said he hopes Wells will be able to practice Friday but that his status was “up in the air,” according to Jason Wilde of ESPN Milwaukee.

By my count, that would make the seventh different combination of starters in 10 games for the Packers. Some of that has been injury-related, but none of it has been positive for creating efficient and cohesive play.

Continuing around the NFC North:

• Opposing offenses are turning their protection toward Packers cornerback Charles Woodson because of his frequent blitzes, write Greg A. Bedard and Tom Silverstein of the Milwaukee Journal Sentinel.
• The Packers replaced quarterback Brian Brohm on the practice squad with former Central Washington starter Mike Reilly. Here is some background from Pete Dougherty the Green Bay Press-Gazette.
• Minnesota coach Brad Childress’ contract extension will kick in immediately and supersede his previous deal, writes Judd Zulgad of the Star Tribune.
• Could the Vikings lose a coordinator or two after the season? Sean Jensen of the St. Paul Pioneer Press looks into it.
• Chicago general manager Jerry Angelo: “I’m not alarmed.” Mike Mulligan of the Chicago Sun-Times has more.
• Interesting statistic for Bears fans: Philadelphia is 0-7 all-time on Sunday night, writes Vaughn McClure of the Chicago Tribune.
• The Bears could be without tight end Desmond Clark (neck) on Sunday night, according to Jeff Dickerson of ESPN Chicago.
• Detroit will be blacked out Sunday for the third time in five home games, writes Tom Kowalski of Mlive.com.
• The Lions’ dropped passes have been “contagious,” coach Jim Schwartz said. Nicholas J. Cotsonika of the Detroit Free Press explores the issue.
• John Niyo of the Detroit News traces the similar career paths of Schwartz and Cleveland coach Eric Mangini.