Minnesota Vikings quarterback Brett Favre, center, signals in the huddle in the first quarter of an NFL preseason football game against the San Francisco 49ers in San Francisco, Sunday, Aug. 22, 2010. (AP Photo/Tony Avelar)

Photo by: Tony Avelar

Minnesota Vikings quarterback Brett Favre, center, signals in the huddle in the first quarter of an NFL preseason football game against the San Francisco 49ers in San Francisco, Sunday, Aug. 22, 2010. (AP Photo/Tony Avelar)