Brett Favre is reportedly planning to retire from the NFL. The Minneapolis Star-Tribune reported on August 3, 2010, that "multiple sources" have indicated the 40-year-old Minnesota Vikings quarterback will call it quits after 19 seasons in the league.http://www.startribune.com/sports/vikings/99841644.html?elr=KArksLckD8EQDUoaEyqyP4O:DW3ckUiD3aPc:_Yyc:aU1yDEmP:QMDCinchO7DU Favre has not commented on the reports, but ESPN said "a statement is expected." Favre has announced his retirement twice before: once in 2008, as the Green Bay Packers quarterback, and again in 2009, as a New York Jet. In 2009, however, Favre became the Minnesota Vikings QB.http://sports.espn.go.com/nfl/news/story?id=5433551

If Favre is indeed leaving pro football, he will go out as having had one of the most successful careers for a quarterback in NFL history.Packers.com: Brett Favre

Brett Favre was drafted by the Atlanta Falcons in 1991. A year later, he was traded to play behind Don Majkowski as the second-string quarterback for the Green Bay Packers. In 1992, Favre, replaced starter Majkowski in a game against the Cincinnati Bengals. Since that point, Favre did not miss a start for the rest of his career.Packers.com: Brett Favre

In 2008, Favre reconsidered his initial retirement, returned to the league and was traded to the New York Jets. He led the Jets to a 9-7 season in 2008, just missing the NFL Playoffs. In an email to ESPN, Favre expressed his appreciation of his time with the Jets, saying he was honored to have been given that chance.ESPN.com: Sources: Favre tells Jets he's retiring (February 11, 2009)

After yet again saying he would retire, Favre signed a deal to become the new quarterback for the Minnesota Vikings in 2009. Favre led the Vikings to a 12-4 season and an appearance in the NFC Championship game against the New Orleans Saints. The Saints won the game, and went on to win Super Bowl XLIV.

• ESPN Video: Stress is the Reason for Brett Favre's Retirement (Time: 1:29)

• SportingNews.com: Brett Favre is retiring (March 4, 2008)

• SportingNews.com: Favre retirement the saddest day of Packers fans (March 4, 2008)

• Wisconsin State Journal: BREAKING NEWS: Favre to retire, according to FoxSports.com (March 4, 2008)

• CBSSports.com: Reports: Favre decides to retire, tells Packers he's done (March 4, 2008)

• Deadspin: Brett Favre Retires. Seriously This Time. (March 4, 2008)

• Topix.net: Brett Favre Retires

• Google News: Brett Favre Retires