Hansen (hip) was placed on injured reserve by the Saints on Sunday, Nick Underhill of NewOrleans.Football reports.
Hansen came into Sunday's game against Detroit deemed questionable; however, he'll now be sidelined for at least the next three games with the hip issue. With Hansen out, Demario Davis is the only healthy weakside linebacker on the roster, and Craig Robertson and Zack Baun should see more action on special teams.