Twice during his news conference following the Vikings' 31-3 loss to the Packers, Favre said he planned to "go home" and "re-evaluate."
While he was not clear about what he would re-evaluate, Favre did not directly answer a reporter who asked if he was committed to playing the rest of the season.
"I would never have expected to be in this situation," Favre said. "Mathematically I think there is still some hope. I hate to use Jim Mora's comments about playoffs. I can't even think about that. I know there is still a slim chance, but come on. We've got to play a lot better than we played today and last week.
"I came back for a Super Bowl, you're right. Also [there is] a chance that that doesn't happen, probably a better chance that we don't. And there's a way better chance that you won't play as well as last year. ... But this is a little surprising. Again, I'm just going to go home and ... I don't want to say 'think' about this game. Just re-evaluate tomorrow."
Though he declined to detail what his future holds, Favre did say he remains committed to Minnesota.
"I'm here, and we're in this thing together," Favre said.
Favre's future may hinge on the status of coach Brad Childress.
Favre and Childress have clashed repeatedly this season, over both the quarterback's injuries and his decision making.
Before Sunday's game, Favre told ESPN's Ed Werder that he's still stung by Childress' postgame critcism following the Vikings' 28-24 loss to the Packers in Lambeau in Week 7.
"It's a damn shame," Favre told Werder about the game in which he suffered two fractures in his left foot. "What I think about is going to my press conference knowing he had taken some shots at me.''
After the Oct. 24 loss, Childress launched into an angry tirade against Favre, calling out the quarterback's thought process on his three interceptions. Childress also said after that game that he considered benching Favre.
Favre appeared exasperated in his own news conference that night, but his comments to Werder were the first time he admitted to taking offense at Childress' statements.
Favre also told Werder that he took every practice repetition last week in an effort to create enthusiasm among his teammates. Favre reported right shoulder pain last week, possibility related to a partially torn rotator cuff, but he said: "If the arm comes off, it comes off. If I can't throw anymore, I can't throw anymore. I've got nothing to save myself for now.''
After a loss in which Favre was seen arguing with offensive coordinator Darrell Bevell on the sidelines, Vikings owner Zygi Wilf walked sternly out of a silent locker room without commenting on Childress' job status.
"I can't really talk about that," Childress said, "because that's not my decision going forward."
An NFL investigation into alleged photos and messages that Favre sent to former Jets gameday hostess Jenn Sterger took a new turn as well on Sunday.
A source familiar with the situation told ESPN NFL Insider Adam Schefter that the NFL is conducting high-tech forensic work to trace the electronic pathways and transmission of any photos or messages that might have been sent during communication between them.
Sterger met with the NFL earlier this month for three hours and provided league investigators with "substantial materials," according to her agent. Among the items turned over were cell-phone records, at least one phone and a SIM data card.
Kevin Seifert covers the NFL for ESPN.com. Information from ESPN NFL Insider Adam Schefter, ESPN's Ed Werder and The Associated Press was used in this report.