Matthew Real, Mark McKenzie, Anthony Fontana and Justin McMaster were among the 36 players called in for the first U.S. U18 training camp of 2016.
New United States Under-18 head coach Omid Namazi included four Philadelphia Union Academy players in his first roster since taking over the job earlier this month.
Defenders Mark McKenzie and Matthew Real, midfielder Anthony Fontana and forward Justin McMaster are training with 32 other players through January 23 at the Premier Sports Campus in Lakewood Ranch, Florida.
The camp is in preparation for games they are playing in Argentina in March.