You may have heard that the crowded local sports-talk arena recently expanded to the FM dial, but the most venerable such show in town and its host, Kevin Wheeler, remain the one-stop station for a complete digest of sports news and chatter: Sports Open Line on KMOX. Weeknights from 6 till 8 p.m., Wheeler plies the mic with humor, smarts and a gregarious nature that invites — and often provokes — caller commentary. He's an ex-jock (University of Miami baseball), but he never comes across as arrogant. It's perhaps telling — and refreshing — in this era of inter-media multitasking that radio is Wheeler's main gig.