Garber hints that Canadian-player rules in MLS may change: Why we need to look at minutes played, not roster spots 15 Jul 2014 So, as MLS looks to tweaking or making major changes to the international rule as it relates to Canadians, the Canadian Soccer Association and the league need to set a goal that’s more cut-and-dried than giving more roster spots or even, gasp, dropping the Canadians-as-internationals-on-American-teams designation. Someone needs to write down a number. And that number would be a ballpark average of first-team minutes for Canadians.