His career after beating Georgia has to be one of the worst coaching flame-outs in history. He was 39-14 over 4 years as a head coach with two top-10 seasons (2015 and 2019) and a Sugar Bowl win. Then he gets fired by Texas two years later, has a cup of coffee in the NFL, and gets fired by Florida Atlantic in less than 2 years for going 6-16. Lots of guys fail to live up to expectations, but dayuum!
Plenty of guys had success and didn't pan out:
Guys who had success at a lower tier and couldn't win at a higher level - Charlie Strong, Scott Frost, a bunch of other guys
Cavemen who caught lightening in a bottle - Gene Chizik, Ed O
Guys who were in the right place at the right time - Sonny Dykes, Dave Aranda
Terrible human beings - Art Briles, Joe Paterno
Addiction - Sark at USC
How many coaches went from success at the highest level to G-5 schools that quickly based solely on their record and personality?