With the arrival of Sporting Director Ernst Tanner has come a variety of changes that have shaken up the roster significantly since last season.
One of the most significant changes is the new 4-4-2 diamond high pressure system that the Philadelphia Union have been sticking to throughout preseason. With this system has come personnel changes as the old 4-2-3-1 tasked players with significantly different roles.
The most significant change is the removal of attacking wingers from the system entirely, replacing them with outside backs who patrol the entire length of the pitch. Arguably, attacking wing was the position where the Union had the most depth and skill before this season, so obviously the team has had to make changes.