Yeah ignoring the morale piece (which, is something) I'm not sure what information this individual revealed could be considered against athletic administration rules. None of that is privileged information (assuming as you are that the email from Seth's mother came from the original video leak from an Iowa runner and not this individual accessing Seth's email). Their "leaks" have been:
1. An all-athletic email blast. That's not private communication.
2. Conversations taking place in a public area (the gym/weight room). Anyone conversing in there doesn't have a reasonable expectation to privacy. It'd be different if this individual had their ear to Dimit's door or something.
3. Personal opinions on Dimit and Tucker, their relationship, and things an individual picked up in conversation or in the lockerroom. These are protected opinions of the individual.
I think most athletic departments have language around "conducting yourself in a manner that reflects well on the university" or something vague like that so they can cover their backsides if they need to discipline an athlete for doing something stupid but not technically illegal or against school policy, e.g., a star athlete of legal drinking age caught on video using slurs at a bar. But I think Rowan would have a hard time making a case that the above behavior falls into that category in a lawsuit, especiallyif this athlete had tried to raise concerns previously through the appropriate channels and nothing happened.