The Saints topped the 49ers on a last-second field goal on Monday night but Who Dat Nation suffered a big loss in running back Reggie Bush.
According to Adam Schefter, the versatile back's initial diagnoses following his fourth-quarter injury was a fractured fibula.
He hurt himself after recovering a muffed punt with 6:58 remaining.
"Last second it kind of shifted a little bit, just enough for me to drop it," he told The Associated Press. "I tried to recover it and somebody took my leg out. I don't know who it was, what happened or how it happened. I just know my leg got taken out. That's it."
Bush, who will have an X-Ray in New Orleans, could miss up to six weeks of action.
"It hurt like hell," he said. "When I got back up and tried to walk on it, it felt terrible. That's all I can say."
