JON GANGNON and OWEN O'BRIEN

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Mack leads promising linebackers in final season

At the end of last year, the Bulls were unsure if one of the most dominant defensive players in program history would return for his senior season. During a trip to linebacker Khalil Mack's Fort Pierce, Fla., home in the offseason, head coach Jeff Quinn and his staff convinced Mack to return and graduate as a Bull instead of pursuing the NFL Draft. The soon-to-be senior Mack returns to cement a linebacking core looking to take the Buffalo 'D' to the next level. Mack, a two-time All-Mid American Conference first-team selection, decided he had 'Unfinished Business' - Quinn's slogan - at Buffalo.