I 've discovered that this was the jersey used by Philadelphia Union in its first year in MLS ( 2010 , they also used it in 2011 ) .
It 's like having a piece of history in the collection .
I 've discovered that this was the jersey used by Philadelphia Union in its first year in MLS ( 2010 , they also used it in 2011 ) , so it 's like having a piece of history in the collection .