I thought you might be right about the 31-0 going back to Sherrill, as I remember we had four 4th qtr comebacks in 2007, so I went back and quickly checked the box scores of Croom's wins.
We also led UK after 3 quarters in 2004, so in five full seasons, Croom had 16 leads after 3. That's counting SELA, Gardner-Webb, etc.