Jay, yes. That is Mark O'Connor. He is a phenomenal multi-instrumentalist, being a triple threat on guitar, mandolin, and fiddle. He won National & international championships in contests on all three instruments while still a teenager.
That is a true all-star band, and at least Four of them can claim credit on influencing a change in a genre of music, or how an instrument was perceived. Each one is a hero of mine. Probably my biggest hero of them is the mandolin player Sam Bush (currently the band leader for Emmylou Harris).