Seattle Sounders GK Stefan Frei calls controversial PK call vs. Sporting KC "most frustrating" of career
Champions League: Salvadoran Joel Aguilar named referee for Montreal Impact's second-leg match vs. Alajuelense
Orlando City's Adrian Heath says officials must be "really careful" about simulation after three players were carded
IFAB will consider use of video replay for referees on trial basis; Dutch Cup ready to run pilot program
PRO releases list of referees for 2015, sets dissent and persistent infringement as "areas for reviewing"
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