Hernandez becomes the team's third Homegrown Player.
Hernandez, 18, has been a member of the Union's academy and has played in the reserve league and against English Premier League side Everton in a friendly last season. A native of Mexico, Hernandez will occupy one of Philadelphia's international roster spots.
In 2011 Hernandez was named U.S. Soccer U-17/U-18 Development Academy Player of the Year as he netted 16 goals in 26 matches for the Academy.
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