Weatherspoon is listed as questionable for Sunday's game against the Vikings due to an illness, Vaughn McClure of ESPN.com reports.
Weatherspoon was a new addition to the injury report and did not practice Thursday and Friday. The 29-year-old has been a rotational middle linebacker that has mostly played special teams since signing with the Falcons in late October, and he'll likely to be a game-time call in Week 13.