Philadelphia Union Kit History - Football Kit Archive
MLS Jerseys - Refuse You Lose
MLS team kit rankings - the good, the bad, and the ugly - 3rd Degree
Adidas' Inter Miami, Minnesota United, Seattle Sounders, Philadelphia Union 2020 MLS jerseys
Philadelphia Union Kit History - Football Kit Archive
The 12 days of Union Kits-mas – The Philly Soccer Page
MLS team kit rankings - the good, the bad, and the ugly - 3rd Degree
The worst MLS jerseys of the 2010s – The Philly Soccer Page
Philadelphia Union 2010 Primary Jersey – Club 25 Football
Rainbow splash to electric green: the best (and worst) kits in MLS history, MLS
Philadelphia Union honor five time US Open Cup champ Bethlehem Steel with new jersey (video)
The best and worst MLS kits of all time: Galaxy, Sounders epitomize the good and the bad - ESPN