UNC Football Coach Mack Brown Undergoes Successful Knee Replacement Surgery Posted Jun 4, 2019 North Carolina football coach Mack Brown underwent successful knee replacement surgery on Monday. The procedure on his right knee was performed by Dr. Michael Bolognesi at Duke University Hospital. Bolognesi played football for UNC under Coach Brown from 1989-93. "The surgery went really well with no issues or complications," said Bolognesi. (GoHeels.com)