It depends on what the conversation was like, I suppose. Was it part of a formal interview, or two guys shooting the breeze on a slow day at practice, or ...?
For him to use it, he must believe Hargrove won't have a problem with it. I'm in a different situation -- because I cover mainly preps, there's a TON of stuff I can't/won't go into detail about, because you just don't do that to high school kids.
On a somewhat related note, Chuck Pollock wrote a column yesterday from an interview with a prep football coach. Touchy subject -- the guy was essentially forced out of the job at his alma mater, a couple of months after being asked to coach the Pennsy squad in this year's Big 30 Game. I was standing a few feet away while they talked, and Chuck asked him at least twice if he was OK with this info ending up in the paper ...