Jon Gruden targeted Paul Guenther as his defensive coordinator in his return to Oakland even before he got the Raiders job, believing his aggressive defensive scheme was just what the team needed to reverse years of bad play.
Guenther's task has been even harder than originally thought because he is still waiting to get Oakland's best defensive player in camp.
Star edge rusher Khalil Mack skipped the entire offseason program and now extended his holdout into training camp as he seeks a long-term contract commensurate with the skills of one of the NFL's top defensive players.
"I really can't worry about that right now," Guenther said Sunday after Oakland's first padded practice.