The Dolphins have signed 26-year old fullback Boomer Grigsby.  Grigsby is a converted linebacker who played fullback for the first time last season.  He caught 2 passes for 14 yards for the Chiefs but he didn’t get any carries.  In 44 games in his NFL career Grigsby has made 35 tackles.  Ths position change will help Grigsby’s NFL career.