The 6-week program features 12 team practices, running through late July.
Emmanuel Latte Lath had a goal and an assist and Miguel Almirón had three assists to spark Atlanta United to a 3-1 victory over Philadelphia on Saturday, extending the Union's worst start in club history.
Philly-native Rob Mac, formerly known as Rob McElhenney, is bringing his team from Wrexham home to play a friendly match against British soccer heavyweights Sunderland AFC this summer.
Tayvon Gray scored in the ninth minute of stoppage time to help New York City FC beat the Philadelphia Union 2-1 on Sunday.
Hailed as the MLS' teen soccer sensation, 16-year-old Cavan Sullivan delivered an American scoring record with his first professional goals for the Philadelphia Union.
Tai Baribo scored a goal against his former team on Saturday night to help D.C. United beat the Philadelphia Union in the season opener for both teams.