Sam Keller's whirlwind week found him with new teammates on the Nebraska practice field Thursday. A week ago Keller was Arizona State's starting quarterback. Thursday, he was wearing a green No. 5 practice jersey and preparing to lead the Cornhuskers' scout team. "A lot of things happened really fast, back-to-back-to-back," Keller said. "It came at me really quick, so I had to have my head on straight. It's been fun, though. Once I get settled in here, it's going to be a nice deal."