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Sebastien Le Toux: Perhaps the one person who best exemplifies why the Expansion Draft should not be abandoned, Le Toux was playing with Ligue 2 side Lorient when he tried out for FC Dallas in 2007. The trial was unsuccessful, so he signed with the Seattle Sounders - who at the time were in the USL's First Division. Le Toux was one of the best players on the USL side and was signed as the Sounders' first MLS player prior to the club joining MLS in 2009. He made 28 appearances for the Sounders, however was left unprotected in the 2009 Expansion Draft. The Union selected him fourth in the Expansion Draft, and Le Toux immediately cemented himself in the Philadelphia sports landscape with a hat trick at the Linc in the Union's first home match against D.C. United. He led the Union with 14 goals in 2010 - still the team's single season goal record. He was unceremoniously traded to the Vancouver Whitecaps in 2012 after a failed trial with Bolton Wanderers - a move that ultimately turned the fans on then manager Peter Nowak, leading to his firing. Le Toux was traded to the New York Red Bulls midway through the 2012 season, however at the end of 2012 he was traded back to the Union. He's been here ever since, amassing every offensive career record for the Union - most goals (48), assists (45), most games (154), and most minutes (12,231).
Danny Mwanga: Mwanga was the first pick in the 2010 SuperDraft, and for a while it seemed like he would live up to that billing. 2010 was good for Mwanga, who had seven goals and four assists in 24 appearances. 2011 was another good season for the Congolese forward, who had five goals and four assists in 28 games, and things seemed like they would continue well for Mwanga. 2012 was the beginning of the end though, as he was traded midway through the season to the Portland Timbers for Jorge Perlaza - a player who made exactly two appearances for the Union before mutually terminating his contract. Mwanga then spent two years in Colorado with the Rapids, playing just 770 minutes in 19 games. He was selected in the 2015 Expansion Draft by Orlando City, and there were hopes that there would be a bit of a revival for Mwanga, however he played just 110 minutes in 4 appearances.
Alejandro Moreno: Moreno was one of the Union's veteran leaders, having been in the league for eight seasons before coming to the Union. Taken in the 2002 MLS SuperDraft by the LA Galaxy, Moreno made 61 appearances, scoring 12 goals and contributing six assists before being traded to the San Jose Earthquakes in 2005. Moreno made the move to Texas in 2006, when the Quakes relocated and became the Houston Dynamo, scoring 11 and notching 10 assists for the Quakes/Dynamo. During the 2007 season, Moreno was traded to the Columbus Crew, where he had arguably the best stint of his career. He led the 2008 Crew to win the MLS Cup, and scored 20 goals and had 12 assists during his three seasons in Columbus. Moreno was left unprotected by the Crew in the 2009 Expansion Draft, and Philadelphia snapped him up. He had a bit of a down season in 2010, scoring only twice but contributing seven assists in his 26 appearances for the club. He was selected by the Vancouver Whitecaps in the 2010 Expansion Draft, however was traded to Chivas USA before the season began. Moreno played two seasons with Chivas, scoring seven goals and contributing two assists before retiring in early 2013. He then went to work as a play-by-play commentator for the Philadelphia Union before joining ESPN, where he has gone on to cover Liga MX and MLS matches as well as the FIFA World Cup in 2014.
Jack McInerney: Turning pro fresh out of high school, McInerney was selected seventh overall in the 2010 SuperDraft by the Union. McInerney worked his way from backup to bench to first team starter, scoring 25 goals in 95 games for the Union, even earning a United States National Team call up in 2013 (however never earning a cap at the senior level). McInerney was traded early in the 2014 season to the Montreal Impact for Andrew Wenger. With the Impact, McInerney scored 11 goals in 43 appearances, however was sent to Columbus in 2015 for a second round pick in the 2016 SuperDraft.