Joe Buck is leaving postseason baseball in his past. The longtime play-by-play man revealed on “ Sports Media with Richard Deitsch ” that he was offered the chance to call playoff baseball on ESPN last year, but turned it down — and its a choice he’s still comfortable with. “As you and I sit here right now on April 10, I don’t even know who’s got the postseason anymore,” Buck said on the episode that dropped Saturday. “I assume ESPN’s got a game, maybe they don’t… Well, there you go — NBC has