I always found Bob Costas as more fluff than substance as a baseball broadcaster. He'll state the obvious and convey it as a subtle nuance of the game. Oh, for the days of Curt Gowdy, Tony Kubek and Joe Garagiola for a quality NBC broadcast team.
Or even Peewee Reese and Dizzy Dean. "I believe I'll have me another Falstaff, Peewee"