A broken ankle is a serious injury and normally can take 9 to 12 weeks, and possibly even more for people who play sports, so it seems odd that head coach Chris Petersen said that it is possible that Southwick could return this year. It is likely that Southwick is done for the season, or at least until there is more information.
There is a lot more to look into Southwick's ankle such as surgery and if screws are need; those things could determine how long that he could be out. Southwick left the game on he was tackled on a 7-yard run on his first play when he landed awkwardly on his right ankle when tackled.
This is a big blow for Boise State going forward, but luckily for the Broncos they have a capable backup in Grant Hedrick. The Broncos did end up defeating Nevada, 34-17, and Hedrick did enough to get the win. He ended up completing 18 of 21 passes for 151 yards with an interception, but he did have a great night running the ball with 115 yards and two touchdowns.