The Vikings announced the signing of LB Marvin Mitchell on Tuesday. Terms and conditions were not announced.
Mitchell played last season for the Dolphins after spending the first four years of his career with the Saints. He came off the bench in all 16 games for Miami in 2011, registering 30 tackles and a forced fumble. The linebacker also added an interception, which he returned 55 yards vs. the Jets in the season finale.
Minnesota re-signed LB Erin Henderson earlier in the offseason, but have yet to come to terms with free-agent MLB E.J. Henderson.