"Right now we've got him in a boot, so right now he'll be questionable for the game," Fitzgerald told the media in his weekly press conference. I'll probably be able to let you know more on Thursday."
Since the injury, Persa has undergone treatment on his toe. Fitzgerald is pleased with his progress.
"It's one of those deals when you kind of sprain the joint in your toe," Fitzgerald said. "We'll see how it responds as he goes through treatment. He feels a lot better today than he did yesterday. So we'll see how that progresses."
If Persa is unable to play, Fitzgerald will have to choose between redshirt freshman Trevor Siemian or Kain Colter as his starter. For now, Northwestern will prepare as if Persa will be available.
"We'll operate and expect Dan to play and we'll adjust accordingly as the week goes along," said Fitzgerald. "I like the role we've been able to put Kain into. I think it's keeping defenses off balance, and then obviously having a guy like Dan back there who's put almost career numbers up the last few weeks, especially against Penn State, who I think was one of the top-rated defenses in the country going into the game. He's been playing at a pretty high level. So I'm pretty excited for both guys I guess is what my answer would be."
In his four games of action, Persa has completed 74.8 percent of his passes and thrown for six touchdown passes. The Wildcats are currently in the midst of a five-game losing streak as they prepare to play the Hoosiers on Saturday.