NYCFC v Montreal - Postmatch

I like how EJ's towel is one that he probably packed from home. Looks like a solid Home Goods purchase.
 
I was thinking that when I watched the game. When the subbed off players came out, PV went over to each one with a smile, high five or hand shake, a supportive pat, and what looked liked words of encouragement.

Hang on a second, I'm confused this PV is he the coach/manager? What is he doing talking to players during the game? Is he also discussing the game with them before and after too? I am very confused about this "coach" role. Can someone with more sports knowledge explain it to me.
 
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