Philadelphia Union midfielder Cavan Sullivan is the youngest ever in MLS. He’s just 14 years old The Associated PressSullivan, 14, bests Adu, youngest to play in MLS ESPNPhiladelphia’s Cavan Sullivan, 14, breaks Freddy Adu’s youngest MLS player mark The GuardianCavan Sullivan, 14, breaks Freddy Adu’s record, debuts in an evolved MLS Yahoo SportsCavan Sullivan, 14, could break MLS record after being named in Philadelphia Union squad for first time – The Athletic The New York Times