Source: Favre remains undecided

Quarterback Brett Favre is aware Donovan McNabb would potentially be an ideal replacement for him as Minnesota's starting quarterback if Favre decides not to return in 2010, according to a prominent Vikings source.

However, Favre remains uncertain about his NFL future and the Vikings have not pressured him to make a decision even as rumors of an eventual McNabb trade from the Philadelphia Eagles increase, according to the source.

McNabb spoke with Eagles coach Andy Reid and told him of his preference to remain in Philadelphia, a team source told ESPN's Adam Schefter on Friday. The Buffalo Bills and Oakland Raiders have also shown interest in the 33-year-old quarterback.

McNabb is due a $6.2 million roster bonus on May 5, which is one reason trade rumors have heated up. Kevin Kolb and Michael Vick are also on the Eagles' roster. Schefter reported Friday sources around the league expect Kolb to be the Eagles starter when the 2010 season begins.

Vikings coach Brad Childress, who ardently pursued Favre and convinced him to come out of retirement last summer, was McNabb's quarterbacks coach and offensive coordinator in Philadelphia before coming to Minnesota. As was the case with Favre in leading the Vikings to the NFC Championship game, McNabb is extremely familiar with the Vikings' offensive system and terminology because of its similarity to the Eagles.

Ed Werder is a reporter for ESPN. ESPN Insider Adam Schefter contributed to this report.