Favre retired? Maybe not

Green Bay Packers quarterback Brett Favre, who announced his retirement last month after 17 seasons, could be looking into resuming his career with another franchise.

According to NFL sources, Favre’s agent has quietly inquired with teams about their interest in trading for the three-time NFL most valuable player. The sources did not indicate whether Favre knew of the inquiries.

Favre, 38, has yet to give written notice of his retirement to the league or players’ union, although that’s neither required nor irrevocable. It’s also not uncommon for players to delay in doing so, particularly if they are not in immediate need of their pension money.

Agent James “Bus” Cook said he was not aware of Favre’s interest in coming back from retirement.

“That’s news to me,” Cook said Thursday in a telephone interview. “I don’t think that has anything to do with anything. He’s retired, period, point blank.”

Favre’s rights still belong to the Packers, who could trade him to another team.

Ted Thompson, general manager of the Packers, dismissed the report. “We don’t know anything about it, and it’s inconceivable,” Thompson told the Associated Press.

The league sources said Favre’s decision to retire was partially influenced by his frustration that the Packers didn’t make a more aggressive attempt to sign Randy Moss. The team twice had a chance to do so, first in spring 2007 -- before New England acquired the All-Pro receiver from Oakland -- and again this off-season.

Favre retired a day after the Patriots re-signed Moss to a three-year, $27-million deal. Cook, who, along with agent Tim Dipiero, handles contracts for Moss, denied any link between the receiver and Favre’s decision to retire.

“As far as I know, Brett retired because he was tired and burned out,” he said.

One of Favre’s closest friends on the team, wide receiver Donald Driver, said he was convinced Favre was finished with football -- but couldn’t completely rule out the possibility of a Michael Jordan-style comeback for Favre.

“I don’t know,” Driver told the Associated Press. “It’d be hard to say.”

Last season was among Favre’s best. As the quarterback of the league’s youngest team -- one loaded with unheralded and overlooked players -- he completed a career-high 66.5% of his passes for 28 touchdowns with just 15 interceptions, and led the Packers to the NFC championship game against the New York Giants.

At the league meetings in Florida this week, before the latest report, Packers Coach Mike McCarthy said Favre will be sorely missed as a team leader.

“There’s definitely going to be an absence,” McCarthy told reporters.

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sam.farmer@latimes.com