Five Philadelphia Union players to watch in 2019 – The Philly Soccer Page
Top 10 MLS NEXT Pro Players to Watch in 2023
Fight and Fire in Philadelphia, Revisiting three of the Revs' most memorable trips to Pennsylvania
Brenden Aaronson: The 'U.S. Havertz' set to swap MLS for Europe's top leagues
Previewing Houston Dynamo vs Philadelphia Union with Brotherly Game - Dynamo Theory
U.S. Soccer Development Academy
Union II midseason roster analysis: Academy prospects – The Philly Soccer Page
Pathway to the Pros: The Union's Homegrown Players – The Philly Soccer Page
Mark McKenzie (soccer, born 1999) - Wikipedia
The Union first team's 2021 roster – The Philly Soccer Page
Six Academy players FC Dallas should sign this summer
INTERVIEW: Quinn Sullivan on playing for Philadelphia, the USA & Lionel Messi
Aaronson joins FC Salzburg in record-breaking transfer from Philadelphia Union - ESPN