The New England Patriots worked out linebackers James Anderson, Marvin Mitchell and Stevenson Sylvester, according to a league source.
None of the players were immediately signed.
Anderson started every game last season for the Chicago Bears, recording 102 tackles and four sacks. He previously played for the Carolina Panthers and has 556 career tackles and a dozen sacks with three interceptions.
Michell had 42 tackles last season for the Vikings. The former New Orleans Saints draft pick has 171 career tackles, two sacks and one interception.
Stevenson had a dozen tackles in nine games with one start for the Pittsburgh Steelers last season. He has 34 career tackles for the Steelers in four NFL seasons.
Follow me on Twitter: @RavensInsider
Aaron Wilson covers the Ravens for The Baltimore Sun.
Check out our partners at TiqIQ for the best deals on all games on the 2014 NFL schedule.
SEP 16 Joel Corry
After registering 19 sacks in 2013, the St. Louis pass rusher cashes in big.
SEP 16 Jeff Fedotin
First-place squad could start 5-0.
SEP 12 Football Rumor Mill
Here's what you need to know after 2 weeks of college football.