John Sterling, whose mellifluous voice became the soundtrack of spring, summer and quite a few Octobers to generations of Yankees fans and who during one stretch broadcast 5,060 consecutive games, has died at 87 years old. Sterling, the Yankees’ radio play-by-play voice for 36 seasons, was behind the microphone for five world championship teams and seven American League pennant winners during a broadcasting career that began upstate at a tiny radio station in Wellsville during the late 1950s and spanned an incredible eight decades. John Sterling dead at 87. Robert Sabo for NY Post An eclectic and eccentric character well-versed in Frank Sinatra, classic films, Broadway show tunes, and his favorite soap operas, Sterling was just as apt to break into a song from the second act of “Oklahoma” as he was to describe the intricacies of a well-executed 3-6-3 double play. His over-the-top imprimatur immediately following the final out of Yankee victories — “Ballgame over. Yankees win.…