But it appears almost certain now that if Favre feels he's good to go that he will be starting for the Vikings when they open the season on Sept. 13 in Cleveland.
"My opinion is that (Favre) was a great player," Vikings coach Brad Childress told Twin Cities-based all-sports station KFAN. "He obviously had a setback last year. He was playing very well early. If in fact he's had that surgery, I'm anxious to see just exactly what he's got left in that cannon because he had a pretty good arm as we know."
It remains unclear when Childress might get a chance to see Favre throw, but Childress did say he talked to Favre as recently as last week. ESPN reported on Friday that a Vikings trainer and coach would travel to Mississippi in the coming days to see Favre.
If Favre does return, one point of interest will be how he and Childress co-exist. Favre has long been known as a gun-slinger and Childress is a stickler for detail when it comes to the West Coast offense.
"I think it's more of, just like you talk about with a quarterback, can he manage a game?" Childress said. "I think it's more about that. And then you letting him know your expectations and how we're playing the game here and what we value here. Those are different virtually everywhere you go and every system you play in."
Favre's presence in Minnesota would mean that Tarvaris Jackson and Sage Rosenfels would be pushed to the sideline. Those two had been expected to battle for the starting job in training camp. Rosenfels was acquired from Houston in February for a fourth-round pick.
"I talked with Sage and Tarvaris," Childress said. "They are competitors. Do they like any of the conversation (about Favre coming)? Absolutely not. But they know this. I'm charged with adding and subtracting players from this team to make us better.
"Every day when I walk in this office there's not a day that I don't try to look and see if we can get better at some position. And if this is going to make us better down the road and it's got a chance to happen, I'm going to take care of the Minnesota Vikings."
Johnson was selected in the sixth round of the 2008 draft. Johnson, who is 6 feet tall, spent last season on the Vikings practice squad. "I don't know how he does it but he has 3 percent body fat," Childress said. "He's worked his tail off."
QUOTE TO NOTE: "The only thing people ask me is, how much will I sell my jersey number for?" — John David Booty, the Vikings' third-string quarterback, on the main question he gets about Brett Favre potentially coming to Minnesota. Booty happens to wear the No. 4.