Favre tested his sprained right shoulder on the snowy field at TCF Bank Stadium around two hours before the scheduled start of the game. He threw for over 10 minutes, eventually cutting loose with several longer throws before heading back to the Minnesota locker room.
Favre didn't practice all week and was listed as out against the Bears as late as Sunday. But his status was surprisingly changed to questionable on Monday, leapfrogging the doubtful designation.
"Brett Favre attempted to throw the football two days ago and was unable to, due to pain in the SC joint and residual numbness from a brachial plexus injury," Vikings head athletic trainer Eric Sugarman said earlier Monday in a statement issued by the team. "He declared himself out at that time. He woke up this morning feeling much improved. His symptoms and function have improved dramatically over the past 24 hours."
An improvement apparently dramatic enough to get Favre back on the field.
Peterson's last missed game was Nov. 25, 2007, a stretch of 50 straight games. He did not start all those game, but Monday will end his streak of 23 consecutive starts. That was the fourth longest current streak among running backs, behind Chicago's Matt Forte (46 games), Jacksonville's Maurice Jones-Drew (33) and Tennessee's Chris Johnson (30).
The Associated Press contributed to this report.