Last Sunday, Fox Sports reported that Favre had a conversation with then-Lions president Matt Millen in early September during the week Detroit played Green Bay.
The Fox story said Favre spent over an hour on the phone with Lions coaches, giving them a rundown about the nuances of Green Bay's offense.
"That week, Matt Millen called me," Favre told reporters following Wednesday's Jets practice. "Matt and I are friends. I guess I'm a little bit angry because I think my reputation has been well-respected throughout the years. Anytime that's questioned, the type of teammate I am, it does anger me, I'm not going to lie to you. It's unfortunate the way things went down in the off-season, but no hard feelings."
Favre, 44, played in Green Bay for 16 seasons.