The team played its home games at Chester Park in Wallingford, Pennsylvania, the home of the Union practice facility. The team's colors are navy blue and gold. First team assistant coach and head coach of Reading United A.C. Brendan Burke was the head coach of the reserve side.
The new MLS Reserve Division was resurrected for the 2011 season, after not having played since 2008. Each team played 10 games against divisional opponenets, with clubs being allowed schedule additional games against non-MLS opponents, the League began 20 March 2011 and concluded 16 October 2011. Philadelphia Union Reserves played 10 regional Reserve League games as part of the East division in 2011. The Re-launching of the MLS Reserve Division was made possible by the growth of first team rosters from 24 in 2010 to 30 players in 2011. Reading United A.C. Head Coach and former Boston College standout Brendan Burke guided the first ever Union Reserve squad. The most successful coach in Reading’s 15-year history, Burke compiled a 38-9-6 record and led the squad to their first ever PDL regular season title since taking over the reins in 2008. In 2010, he was named a PDL Coach of the Year finalist.
For 2013 and beyond, the Union have chosen to affiliate with the Harrisburg City Islanders. Under this arrangement, in lieu of fielding a Reserve team, the Union will loan a minimum of four players to the City Islanders. Because of this, the Union will no longer field a Reserve team.