From here:
GREEN BAY, Wis. — Brett Favre has decided to retire from the NFL after 17 seasons.
FOX Sports first reported today that the Green Bay Packers quarterback informed the team in the last few days. ESPN.com said that according to Favre’s agent, Bus Cook, the quarterback told coach Mike McCarthy of his decision.
Cook said in a phone interview today with The Associated Press’ Jackson, Miss., bureau that Favre told him the news Monday night .
“Nobody pushed Favre out the door but then nobody encouraged him not to go out that door either,” said Cook.
He said Favre was tired and “the Packers have got future plans and whether those plans included Brett I don’t know. ”