Retirement rumors have swirled around Minnesota Vikings star Brett Favre a few times before, but this time, they might actually be true. Sources have told FOX Sports that Favre has filed retirement papers that would end his 20 year career in the NFL. FOX' s coverage after the jump:

Could Favre's off-the-field troubles also be behind his retirement? The QB's reputation was compromised when inappropriate photos he sent to TV personality Jenn Sterger were leaked to sports blog Deadspin and, more recently, when two massage therapists for Favre's former team the New York Jets, filed a lawsuit over lewd text messages.