Brett Favre's Packers number 4 to be retired by 2016
How Old Was Brett Favre When He Finally Said Goodbye to the NFL?
Mark Murphy: Packers will retire Favre's number before 2016 - NBC Sports
Packers eye Favre return to Lambeau this year
Packers To Retire Favre's No. 4 At Season Opener, Sept. 8
Report: Packers to retire Favre's number on Thanksgiving
Brett Favre's time to be honored by the Packers has come
Brett Favre says no to a comeback with the Vikings
Looking back at Brett Favre's good, bad, and obscure NFL records
No Tears This Time, Favre Retires Again - The New York Times
Report: Packers offer Favre as much as $20 million to stay retired – San Bernardino Sun
What retirement? Favre coming back with Vikings