For now, the Vikings won't end Favre's season, and perhaps his storied career, by putting him on injured reserve.
"I don't see that as being part of the equation at this point," Frazier said. "It looks like there's a chance that we're going to be able to get him back at some point. Hopefully this week."
Jackson twice left the game with an injury, the second time because of a turf toe problem that Frazier said has put the quarterback's availability "in jeopardy" for this week. Jackson leaned heavily on a railing to get up steps toward the locker room after the game.
"That's a difficult injury, particularly when you're a skill-position guy like he is," Frazier said. "So we'll see what happens with that."
Next in line would be rookie Joe Webb, who was going to be used as a wide receiver until the decision was made to make him a quarterback. He hurt his hamstring during a Dec. 5 game against the Buffalo Bills, and he's a sixth-round draft pick whose athletic ability can't mask the fact that he's raw and inexperienced with running the offense. Wide receiver Greg Camarillo was Minnesota's emergency quarterback Monday.
"The circumstances are so unique that we have to think about the now as opposed to long term with Joe," Frazier said. "If he's our best available option, then he'll be the guy that's quarterbacking for us."
The Associated Press contributed to this report.