It makes a lot of sense for another agent to leak the information to attempt to accelerate the issue. It is not likely an attempt to undermine anything.
Suppose that a client of this agent was a legitimate candidate for the UT gig as well as another highly desirable job? The Hogs job or Auburn for example.
If UT was that candidate's first choice, but he was waiting in line behind Gruden, it sure makes a lot of sense for him (and thus his agent) to be interested in expediting the process. He certainly doesn't want the other jobs to fill while waiting to see if he has a shot in Knoxville.
And, of course, the other schools don't appreciate being the bridesmaid, so they aren't going to wait around either.
As the OP said, it's just business.