Arizona Coyotes' GM abruptly resigns amid front-office tensions

The recent revolving door in the front office of the Arizona Coyotes continued spinning over the weekend with the abrupt resignation of John Chayka, the National Hockey League team's general manager and president of hockey operations. No specific reasons were given for Chayka's departure by the GM nor the team, which made the announcement on Sunday. The move comes just as the Coyotes are about to start the NHL's Western Conference playoffs being held in Edmonton, Alberta. Chayka, who had worked…