Not sure about that, but within the SEC they have played the fewest ranked opponents over the last three years...Crazy stat:
Alabama has more wins against top 10 teams in the last five years than all but 5 schools have against top 25 teams. (unverified by myself, say in one of the articles about the coaches poll)
http://www.saturdaydownsouth.com/sec-football/sec-teams-vs-ranked-opponents-last-three-years-2014/
While Alabama really dominated the BCS era, especially over the last several years under Nick Saban, South Carolina has dominated ranked opponents to the tune of 12-3 (.800). Only Carolina, Alabama and LSU are over .500 against ranked teams, and only USC and LSU are over .500 against top 10 opponents...
Interestingly, Alabama and Vanderbilt have played the fewest ranked opponents over the time period, while four teams – Auburn, Florida, Ole Miss and Tennessee – have played the most with 17.