Vikings head coach Brad Childress proclaimed on Friday that Brett Favre is "pain-free right now." "My understanding is that he is pain-free right now," Childress said during an interview with KFAN-AM 1130. "Does he have the endurance and the stamina in that arm yet? He doesn't know that yet. It's no different than grabbing a golf club for the first time during the year when you rip around 18 holes, and you wake up the next day and your side hurts. You say, 'Geez, I haven't felt that muscle in a while.' So he's got to build some endurance in that and see if he thinks he can get it back to where he wants to get it." Childress added that it is not a foregone conclusion that Favre will sign and play for the Vikings this season.