fibula
![](https://a.espncdn.com/photo/2017/0203/r177689_600x400_3-2.jpg?w=660&r=16%3A9)
Falcons C Alex Mack holds up early despite apparent leg fracture
Falcons center Alex Mack didn't appear bothered by what sources told ESPN was a broken lower leg as Atlanta jumped to a 21-3 halftime lead in the Super Bowl behind an 86-yard ground game.