Complex sentence: Byers is most widely known and remembered as the man who, as executive producer and promoter, brought the Beatles to Denver--their only Denver appearance--he brought them to the Red Rocks Amphitheatre on Aug.26,1964.
Split into simpler sentences: Byers is most widely known and remembered as the man who, as executive producer and promoter, brought the Beatles to Denver--their only Denver appearance. They performed at the Red Rocks Amphitheatre on Aug.26,1964.