After a 47-year broadcasting career, Mike ‘Doc’ Emrick is hanging up the mic. Emrick announced his retirement Monday after calling hockey for three decades, including 22 Stanley Cup Finals, 45 Stanley Cup Playoffs/Final Game 7s, six Olympics, NHL Winter Classics and All-Star Games. He has spent the last 15 years as the lead play-by-play voice for NBC Sports’ NHL coverage. “It was 50 years ago this fall, with pen and pad in hand at old Civic Arena in Pittsburgh, I got my first chance to cover the National Hockey League. Gordie Howe was a Red Wing, Bobby Hull was a...