Atlanta Falcons' receiver Joe Horn is questionable for Sunday's game at Carolina because of an ailing hamstring. The 35-year-old Horn was added to the team's injury report Saturday. He had practiced throughout the week without any signs of a problem. Horn hasn't made much of an impact in his first season with the Falcons (2-6). Working from a backup role, he ranks fourth on the team with 18 receptions for 165 yards with no touchdowns.