By Zach Barnett Mack Brown is expected to add rising special teams coach to his staff, sources say. Frank Wilson, Jr., is expected to join North Carolina’s staff as a senior special teams analyst, sources told FootballScoop on Monday. Wilson comes to Chapel Hill from McNeese — ironically, the same school where another Frank Wilson was formerly the head coach. Wilson joined Gary Goff’s staff in February as special teams coordinator and defensive backs coach, and now returns to the FBS level before coaching a game with the Cowboys. View the original article to see embedded media. Wilson spent 2…