I don't think I ever heard Emerson on Hot97, but he later came to San Francisco and was paired, IIRC, with Gary Bryan on the 1990's FM reincarnation of KFRC when it was at 99.7. (KFRC-FM bounced around over the years, from 106.1 to 99.7 to 106.9.) Emerson was initially just the newsman for Bryan during AM drive, but over time took on a more prominent and inflamatory role, adding a lot of over-the-top commentary into what was otherwise a music show. He was eventuially shown the door when he said something that was unacceptably offensive. (I wish I could be more specific, but the details have faded after 20-someodd years.)