I wouldn't envision it working out well. Rivera is a great NFL DC, but a lousy NFL HC. College coaching is largely about recruiting. If you can recruit well, you can compete at a high level even if you aren't a great X's and O's guy. Recruiting is largely about charisma and connecting with these kids on the recruiting trail. Just look at guys like Harbaugh, Carroll, and Chip Kelly. All three were very successful college head coaches who recruited at a high level and who are very charismatic. Rivera just doesn't seem to fit that mold.