Minnesota Vikings center Matt Birk is shown during an NFL football game against the Washington Redskins Sunday, Dec. 23, 2007 in Minneapolis.(AP Photo/Tom Olmscheid Stock Photo - Alamy
Joe Flacco trade: Broncos to acquire Baltimore QB, report says
Pro Bowl center Matt Birk leaves Minnesota Vikings, signs $12M deal with Baltimore Ravens – Twin Cities
Minnesota Vikings center Matt Birk is shown during an NFL football game against the Washington Redskins Sunday, Dec. 23, 2007 in Minneapolis.(AP Photo/Tom Olmscheid Stock Photo - Alamy
Minnesota Vikings center Matt Birk is shown during an NFL football game against the Washington Redskins Sunday, Dec. 23, 2007 in Minneapolis.(AP Photo/Tom Olmscheid Stock Photo - Alamy
Minnesota Vikings center Matt Birk is shown during an NFL football game against the Washington Redskins Sunday, Dec. 23, 2007 in Minneapolis.(AP Photo/Tom Olmscheid Stock Photo - Alamy
Baltimore Ravens center Matt Birk, right, talks with Minnesota Vikings linebacker Ben Leber before an NFL football game, Sunday, Oct. 18, 2008 in Minneapolis. (AP Photo/Paul Battaglia Stock Photo - Alamy
Minnesota Vikings - Wikipedia
Matt Birk on Minnesota Vikings: 'They've got championship-caliber stuff' – Twin Cities
Malaka Of The Week: Matt Birk – FIRST DRAFT
Not in Hall of Fame - 21. Matt Birk
90 Matt Birk Photos Stock Photos, High-Res Pictures, and Images - Getty Images
Minnesota Vikings - Wikipedia
Minnesota Vikings center Matt Birk is shown during an NFL football game against the Washington Redskins Sunday, Dec. 23, 2007 in Minneapolis.(AP Photo/Tom Olmscheid Stock Photo - Alamy
Joe Flacco to Broncos: NFL world reacts on Twitter