weekend. Because Ontario University Athletics (of which Alumni Stadium's primary tenants, the Guelph Gryphons, are a member) also has a tradition of playing football games on Labour Day, finding a suitable venue within Southern Ontario would have been impossible. The Toronto at Hamilton matchup was instead played as the nightcap in the 2013 Thanksgiving Day Classic. The Winnipeg Blue Bombers finally took residence at the new Investors Group Field. The stadium was supposed to have been readied in 2012, but construction delays pushed back the opening to the 2013 season. The Toronto Argonauts hosted the Montreal Alouettes at the University of Toronto's Varsity Stadium for their preseason game, the first Argonauts game at Varsity Stadium in 55 years. Return of Touchdown Atlantic After a one-year hiatus in 2012, Touchdown Atlantic returned for the 2013 season with the Hamilton Tiger-Cats hosting the Montreal Alouettes on September 21, 2013. This was the third regular season instalment of the game and the second to feature the Tiger-Cats. This was the first appearance for the Alouettes and it was also the first matchup to feature division opponents. Media On March 21, 2013, the CFL announced it had renewed its exclusive contract with TSN to televise all CFL games through 2018; the contract included the national radio rights to the Grey Cup, which would air on TSN Radio and The Team. The contract had originally been set to expire at the end of the 2013 season. As with the previous contract, the league had no games broadcast on terrestrial television, prolonging an absence dating to 2007 and making it the largest league in North America without over-the-air television broadcasts. On June 21, 2013, the CFL announced it had renewed its distribution deal with NBC Sports Network for United States broadcasts and that ESPN2 would also pick up five additional games for live broadcast. ESPN3 continued to serve as the league's online broadcaster. Rule changes On April 10, 2013 the CFL Board of Governors approved 2 new rules. The first stated that coaches would be allowed to challenge the result of a field goal attempt or extra point attempt. The second rule gave coaches more flexibility on when they can use their timeouts. Coaches could now use both of their time outs at any point during regulation time of a game, as long as they didn't use more than one after the three-minute warning was sounded