View Post Agencies | Brands | Campaigns | Sports MacLaren McCann Delivers Barbershop Heckling for Mastercard By Erik Oster on Nov. 22, 2013 - 8:52 AM The Toronto Maple Leafs and Montreal Canadiens have the oldest, and arguably fiercest, rivalry in the NHL. So to celebrate the two teams meeting in the NHL season opener this year, MacLaren McCann and Mastercard invited fans to ...