Visit to Favre Could Be Blunder By PackersAccording to reports by media outlets in Wisconsin, Green Bay Packers President Mark Murphy has traveled to Mississippi to meet with quarterback Brett Favre and his agent, Bus Cook.The Green Bay Press-Gazette reported that Murphy will ask Favre not to show up for the Packers' training camp.If that report is true, the Packers could be making a major blunder.Under NFL rules, the Packers cannot prevent Favre from playing if he wants to play. They can reinstate him to their roster. They can trade him. They can release him. But they can't make him stay home.And if they do--or perhaps even if they just try--the NFL Players Association could file a grievance on Favre's behalf. The union perhaps could ask an arbitrator to make Favre a free agent. Maybe this is the way that Favre gets to his apparently chosen team, the Minnesota Vikings.The union has a precedent, a previous case in which the Tennessee Titans tried to keep quarterback Steve McNair from working out as their facility during the offseason. McNair, also represented by Cook, ultimately was traded by the Titans to the Baltimore Ravens.Presumably, NFL Commissioner Roger Goodell will reinstate Favre today. If he does, the Packers will have until the close of business Thursday to put Favre back on their roster, trade him or release him.By Mark Maske | July 30, 2008; 12:10 PM ET