The Baltimore Ravens officially announced the release of starting safety Bernard Pollard Thursday, a day after Pollard broke the news of his release on Twitter.

Pollard led the Ravens in tackles last season, and added 17 tackles and a forced fumble in the playoffs, but Pollard's outspoken nature and apparent tendency to complain have been reported as factors that led to his release.

Pollard signed with Baltimore prior to the start of the 2011 season and was the Ravens' starter at strong each of the last two seasons.

"We needed to find a physical presence for our secondary when we lost Dawan Landry a few years ago, and we were fortunate to land a player like Bernard," Ravens general manager Ozzie Newsome said in a statement. "He was everything we hoped he would be: physical, tough and well-prepared. ... He was a good partner with Ed [Reed] on our backside, and he fit in well with our team. Like we say, 'He played like a Raven.' He helped us get to an AFC Championship and win a Super Bowl, and we thank him for all he did for us."

Pollard was due a $500,000 roster bonus if he was still on Baltimore's roster Friday.

"There are many difficult decisions we make every offseason," Newsome said. "They become even more difficult when they involve players who helped us get another Super Bowl trophy."