- How Inter Miami signed De Paul, fit him in MLS roster rules- Explaining MLS' Discovery Rights: What were Müller's extra steps to Vancouver? After spending most of his career playing in Germany for Bayern Munich, Thomas Müller made the switch to MLS to play for the Vancouver Whitecaps. (Photo by Vancouver Whitecaps FC/MLS via Getty Images)Unlike in Europe, the winger could also rest easy after a bad performance. Transfers like these, from the best clubs in world soccer and also to them through outgoing moves, bring more attention to MLS. As the league seeks to continue much-needed growth, it'll be dependent on non-major markets to help support MLS' evolution.