Support three sports stations? Probably not, but I listen to all of them at some point during the day.
WHBQ is programmed and designed to make money, which it apparently does pretty well. There is substantial stability at 560 which must tell us something. I think Eli has been the PD for quite some time and, whether you like various hosts or not, the station sounds fine. Seems to me he certainly knows what he's doing.
680 might do well to stay all network. I had not heard of the switch until I was looking for Air America's latest disaster one day and heard sports instead. I like Fox Radio Sports, as opposed to the news side, and it offers needed relief from time to time.
One would think 730 must do something about their signal if they really want to be competitive. Except for 2:00-3:00 p.m. weekdays, I like the ESPN network. Maybe S.A.S. will grow on me, but I doubt it. All things said, it is ESPN for goodness sake. Too bad the local affiliate has such an inconsistent signal.
As for Chris Vernon, he is really good. Like all of us who are or have ever been in the business, there is always some fault to find. But my take is that he works hard, strives to be factual, has excellent guests and makes every effort to avoid boring radio. The extent of my personal contact with him was a fifteen minute guest shot on a Redbirds' pregame radio show six years go, so I'm not his public relations pimp. But I do know a bit about entertaining broadcasting and Chris is as sound as Memphis has to offer...better than most.
Now then, will all three sports stations make it? They will if they all turn a profit.