Despite contemplating retirement this offseason, Matt Birk has signed a new three-year contract with the Ravens. Birk, 35, has been Baltimore's starting center for the last three seasons. "One of the things we said earlier this offseason is that we were going to focus attention on the offensive line, and getting Matt Birk back is key for us," Ozzie Newsome said. "He is a top player, his intelligence is obvious, and he is a leader on and off the field."