Union's Cavan Sullivan, 14, becomes youngest to make pro debut

(Photo credit: Caean Couto-USA TODAY Sports)

Philadelphia Union midfielder Cavan Sullivan became the youngest player to debut in MLS and North American team sports history when he entered Wednesday night's match in the 85th minute against the New England Revolution.

Sullivan (14 years, 293 days) passed Freddy Adu (14 years, 306 days) for the MLS mark. Adu set it for D.C. United in 2004.

Sullivan entered the match with P