By Jon Wertheim The legendary NFL broadcaster goes deep on his career. But is he headed to Amazon Prime? He prefers not to use periods. As lopsided NFL trades go, well, forget about Matthew Stafford for Jared Goff. In 2006—in what was largely a face-saving PR stunt—ABC allowed its lead pro football play-by-play voice, Al Michaels, to decamp to NBC in exchange for the rights to Oswald the Lucky Rabbit, a precursor to Mickey Mouse created by Walt Disney in the 1920s. Since the swap, Oswald has sat on the intellectual property equivalent of the injured list. Michaels, on the other hand, became th…