MLS to use Next Pro clubs for U.S. Open Cup; Lionel Messi and stars to miss out on historic competition | CBS Sports Headlines MLS to use Next Pro clubs for U.S. Open Cup; Lionel Messi and stars to miss out on historic competition MLS Next Pro teams will now … Continue reading MLS to use Next Pro clubs for U.S. Open Cup; Lionel Messi and stars to miss out on historic competition