The Viking are running out of patience with Brett Favre and want to know if the ex-Jets and Packers quarterback will un-retire by this weekend, according to a report by Sports Illustrated’s Peter King.

King writes, “He’s going to have a make a decision whether to join the Vikings very soon, probably by this weekend, because the Vikings want to know what their 2009 future is at quarterback. I’m told the organization won’t wait for a decision much longer, and if he has to get a minor operation to snip the damaged right biceps tendon that has been giving him pain, he has to do it soon. Like, within a week.”

King also reports that Favre’s tendon in his shoulder is “hanging on by a thread” and that Favre will need surgery to repair the injury. If he does have surgery that would likely require two weeks of rehab by the 39-year-old. King believes that surgery would not effect Favre’s arm strength or accuracy.