On Wednesday, the Professional Referee Organization (PRO) published an article detailing the Philadelphia Union’s game winning goal against Orlando City on Friday night. PRO is the organization responsible for managing the referee and assistant referees program in MLS - so this is about as official as it gets.
PRO’s Training and Development Manager Paul Rejer first focuses on the setup of the free kick.
Referee Jair Marrufo properly sets up the free kick and even warns the Union players who are standing behind the Orlando City wall in a deliberate offside position the dangers of being penalized.