Toronto FC’s game on Saturday against D.C. United will mark a memorable moment in Major League Soccer history: it will be one of the first games to feature a video assistant referee (VAR). Much in the way other major sports league have adopted video replay, VAR will be a fifth member of a game’s officiating crew. The video hub will be located in a booth within the stadium with access to all available broadcast angles.



According to MLS, VAR will review “potential clear and obvious errors or serious missed incidents in four game-changing situations — goals, penalty decisions, direct red cards, and cases of mistaken identity.”



Starting with TFC’s 7:00 p.m. kickoff against D.C., the technology will be incorporated into all remaining MLS games as well as the playoffs and MLS Cup final.



MLS said these changes are the culmination of three years of research and...