Matt Birk played 10 seasons for the Vikings, six as a Pro Bowl center. He then left his hometown team to sign with the Baltimore Ravens, for which he won a Super Bowl championship last season before retiring. The Vikings respect the St. Paul native so much that they have asked him to address the team when training camp begins this week in Mankato, Minn. Birk will share his NFL experiences, including the Super Bowl victory over San Francisco, with Vikings players. Don't be surprised if Birk, 36, a Cretin-Derham Hall and Harvard grad, accepts an offer to advise NFL players regarding potential disciplinary action by the league for on-field offenses, such as fines for late hits. As for other post-playing career options, Birk, as expected after recent auditions, has analyst offers from ESPN and the NFL Network. Birk, who has a home in Mendota Heights and is buying another in Naples, Fla., has long been sought to become involved in politics, but that's an unlikely scenario.