Here's a list of music from ESPN's SEC football programming, along with the artists' websites and links for you to buy and/or download the music:
Music from SEC game coverage
The Cadillac Three featuring Florida Georgia Line, Dierks Bentley, & Mike Eli: "The South" single. (iTunes | Amazon)
Cue Sunrise: "Twist Shake Shout" single not available online at this time.
Music from ESPN's "SEC Nation":
The 4onthefloor: "Boom" single not available online at this time.