Dolphins Sign Armstrong

The Chicago Bears traded defensive end Trace Armstrong to the Miami Dolphins in exchange for Dolphins’ second- and third-round picks in this month’s NFL draft.

Armstrong played for the Bears for six seasons, accumulating 411 tackles and 42 sacks. He was the team’s first-round draft choice in 1989 out of Florida.

The Minnesota Vikings have signed 6-foot-7, 320 pound free-agent offensive tackle Rick Cunningham to a one-year contract worth about $500,000.