SportsCenter coanchor Keith Olbermann once spiced up a routine double-play highlight by informing viewers, "That's 6-4-3 if you're scoring at home...or if you're alone." Olbermann will depart ESPN this week (he is joining MSNBC to host a nightly general-interest talk show), and his wit will be missed on SportsCenter, from which the class clowns tend to graduate early. In 1995 Craig Kilborn left to host The Daily Show on Comedy Central. Now Olbermann's tag-team partner, the vermouth-dry Dan Patrick, is rumored to be among the candidates to replace cohost Charles Gibson on ABC's Good Morning, America. Is it only a matter of time before Kenny Mayne is interviewing Alan Greenspan on Nightline and declaring, "I am amused by the simplicity of the interest-rate structure?"