Citing philosophical differences, the Cincinnati Bearcats and defensive coordinator Joe Tresey have parted ways, the Cincinnati Enquirer is reporting.The 50-year-old Tresey had been the Bearcats coordinator for the past two seasons."Joe was an integral part of our Big East championship in 2008,” coach Brian Kelly said in a statement. “But we differ philosophically on where we want to go defensively in the future."Tresey had replaced Pat Narduzzi in 2007, who left Cincinnati to become Michigan State’s defensive coordinator. The veteran collegiate coach had also been rumored to be a fringe candidate to replace Bill Young at Miami (Fla.).