The third-year running back was poised to be the team's third running back behind
"It's tough especially when things start to work in your favor," Polk said. "You're sitting out and it's hard just sitting there and watching other people play and play well because you want to go out there and show what you can do. It's a process. Everything happens for a reason."
The 5-foot-11, 222-pound Polk has been a key special teams player while making the most of his touches in his first two seasons. Last year, Polk scored three touchdowns on only 11 carries including a 38-yard score in the Snow Bowl. Polk doesn't know if his past performance will affect the decision of whether or not to keep him on the final roster.
"It's more what you're doing now. I feel like that would be a little bit of consideration, but it really comes down to what happens, how the game goes and who's playing, who isn't playing," Polk said. "It's going to be a real tough decision because we have a lot of great guys that deserve to make the team, that deserve to be on the team. Not everyone can win."
Polk said that even if he does play he's still not 100 percent recovered from the injury, but wanted to try and get back on the field because he was tired of watching from the sideline.
"It's definitely going to be like a preview because I've been out for a month. It's my first week practicing," Polk said. "I treat every day like it's my last day. You never know what's going to happen. It's always on the line. I wasn't promised anything. I'm not guaranteed anything being that we have a great host of backs. I'm renting space here. You just have to do the best that you can and work as hard as you can while you're here."