Arizona is certainly not alone in exempting broadcast employees from non-compete restrictions. In 2008, New York passed a similar statute. Other states which have enacted legislation concerning non-compete agreements and broadcast employees include Illinois, Maine, Massachusetts and Connecticut. Michigan introduced legislation in 2007 that would have made broadcast industry non-competes presumptively unreasonable.
Many of these statutory provisions do not apply to broadcast executives or sales managers. The clear intent is for the exemption to govern on-air talent. Why the distinction? It has to do with the test most states apply in determining whether a non-compete is valid or an illegal restraint of trade.
Applying the legitimate business interest test to on-air talent is a little different. The interest to be protected, presumably, is goodwill in audience and network sponsorship retention. That appears to be more than a valid interest for an employer to assert. One can certainly imagine a ratings decline (with correspondent economic losses) if a high-profile anchor defects to a cross-town competitor.
Because most news anchors or sportscasters do not go out and solicit clients (i.e., the viewers themselves), applying the legitimate business interest test as courts have traditionally formulated it can be a little tricky. It is for this reason that the broadcast employees' trade association, the American Federation of Television and Radio Artists, has been aggressive in pushing for legislative non-compete exemptions.