Brett Favre, he's one of the best, if not the best if you look by some of his numbers that he has put up, quarterback of all time.  No one can take that away from him.  But, what are the Vikings thinking?  He's 40, and has had serious screw ups coming down the stretch of the season the past two seasons.  Threw a costly interception in the NFC Championship game against the Giants, and last season totally choked the end of the regular season to lose out on a playoff spot for the Jets.  Is he going to bring in quite a bit of profit for the Vikings this season?  Absolutely.  Does Tavaris Jackson and Sage Rosenfels deserve to just be slammed to the bench in one day just because his name is "Brett Favre?"  No!!!  Jackson and Sage have been putting up with all the Favre garbage that has been going on this past off season and they have been going to the two-a-days, the training camps, the workouts and busting their butts to try and earn the starting spot for the Vikings this up coming season.  Just because his name is Brett Favre, and he shows up to practice yesterday and he's working out with the first string?  I don't care if he's Joe Montana coming out of retirement.  You want the starting job on a NFL team?  You earn it!!  You sign a contract with the team BEFORE training camp so you can get your practice in with the rest of the team.  You workout and you go to the two-a-days, you learn the system, you get acquainted with your receivers, running backs, offensive line, and coodinators.  The Vikings are going to have a mediocre season this year, and the only way there gonna win games is because of Adrian Peterson, and their defense.  They're going to miss the playoffs just barely and it's gonna be because Favre is going to screw it up for them.  They're probably going to trade Jackson this season and there goes there future QB.  Rosenfels will not play and eventually retire somwhere down the road.  And John David Booty?  Yeah no need to even go over all the reasons why he won't do this team any good.