Who Played Roger at Bryant Park?

I went to the Broadway performance at Bryant Park yesterday. It is always enjoyable except there's rude people who come to talk through the performances. There's also people opening huge umbrellas so people sitting behind them cannot see. Anyway, I'm confused about who played Roger in the "Rent" performance. He was very good but the announcer said his name was Collin. I must be mistaken as the "Rent" website doesn't list any Collin as playing Roger. Attendees were talking so much that I must have misheard.

He usually plays Gordon. He's a Roger understudy.