According to Rick Walsh of KDKA, there are five candidates, but thus far he knows of only four. Those four are:
Vince Nicastro- He's been the athletic director at Villanova for 15 years so needless to say he has a lot of experience. He got his undergraduate degree from Bloomsburg State, and his MBA from St. Joseph's University in Philadelphia. He's in his early 50s.
Mark Coyle- He's been the athletic director at Boise State for almost 3 and a half years. In 2014-15, Boise State won the conference championship in football, and both men's and women's basketball. Hired back former offensive coordinator Bryan Harsin to be the head coach, a year after Harsin left to be the head coach at Arkansas State. Harsin was 12-2 this season, his first year as head coach at the school. Prior to Boise State he was the Deputy Athletic Director at Kentucky where he oversaw the day to day operations of the basketball program, among other things. He received his bachelor's degree from Drake, a master's degree from Drake in teaching, and a master's degree from Florida State in sports administration. His wife is a doctor of physical therapy, which Pitt is considered to be the best in the nation. He is 46.
Sean Frazier- He's been the athletic director at Northern Illinois for the past two years. Prior to Northern Illinois he spent six years at Wisconsin in support of Barry Alvarez. A native of Long Island, NY, he played football at Alabama. he received a bachelor's degree from Alabama, a master's degree at the University of Maine, and is currently pursuing a doctorate at Wisconsin. He's in his early 50s.
Scott Barnes- He's been the athletic director at Utah State for the past seven years. Under his leadership the Utah State athletics department routinely finished amongst the most economically efficient athletic departments in the nation. In 2009 Utah State won a national award given to the athletic program that won the most championships with the lowest expenses. Previously he worked for three years at Washington and was the athletic director at Eastern Washington for six years. he received both his bachelor's and master's degree from Fresno State. He also played basketball at Fresno State, and he even played basketball professionally in Germany for a short time. His daughter plays on the women's basketball team. He's 52.