He previously said the outcome of the Super Bowl would not affect his decision. He has played 15 years in the league.
"It won’t matter either way," insisted Birk, a six-time Pro Bowler. "Nobody is entitled to or deserves a Super Bowl and certainly if anybody does, it certainly isn’t me. ... Whether we win or lose, I don’t think it will affect me."
He has considered retirement the past two offseasons. And he will be 37-years-old in July, but has two years left on his contract.
"I haven't decided," Birk simply said after the Super Bowl victory on Sunday night.
He is due to make $2.75 million during the 2013 and 2014 seasons. He made $925,000 this past season.
Should he retire, the Ravens already have his replacement. The team would call on 2012 fourth-round pick Gino Gradkowski to replace Birk.