"I want to thank DJ Durkin for the opportunity to be on his staff, but at this time I feel it's best to step aside to tend to personal matters," Shafer said in the press release. "I'm sincerely appreciative of his support and friendship."
"In high school, usually you line up against one or two defenses, one or two coverages. At the collegiate level, there's a multitude of combinations," Shafer said. "What they're trying to learn about the defense is probably the most difficult thing to learn."