Speir said the background Sullivan has with the Herd offers a perspective that transcends game film.
"Film doesn't always do justice to a team," Speir said. "He's got a great feel of the players, who's faster than they look on film and who's really strong, who are the sharp guys who aren't going to make mistakes and who might make mistakes. It gives you a comfort level of what you're jumping into the ring with."
Mitchell agreed that Sullivan's Herd experience will be essential, and he'll be picking the redshirt sophomore's brain throughout the week.
"Eddie's very helpful," he said. "He has a feel for the game with them. When I go out, he tells me where they go and what they do, so I just take note of that and I can look forward to seeing it in a game. It's helpful because it won't be unexpected when I see it in the game."
Yet Sullivan doesn't believe Marshall players are too worried about what the tendencies and strategies he knows.
"Marshall's going to play their game regardless of who's on the sidelines," he said. "That's basically all they're worried about and that's all they should be worried about. They have to worry about their focus. They can't worry about one other person on the opposite team who played for them at a point."
It won't be Sullivan's first trip back since leaving. His girlfriend still goes to Marshall and he said he's been back to Huntington about five times. He's seen old friends and old teammates each time and they've picked up where they've left off.
That, he said, will make it easier keep from getting psyched out over Saturday's game.
"Obviously, there's things I miss about Marshall and the area and things like that," he said, "but you just have to treat it as if it's another game, that's all."
Contact sportswriter Derek Redd at derek.r...@dailymail.com or 304-348-1712. His blog is at blogs.dailymail.com/marshall.