Original sentence: Mathews has since gone on to numerous subsequent TV appearances, including as a frequent panelist on Chelsea Lately.Ross Mathews (born September 24, 1979), well known as Ross the Intern, is an American television personality who first rose to fame with his role as an intern, and later, a correspondent, for The Tonight Show with Jay Leno, for which he was known "Ross the Intern"
Edited sentence: A former intern on that show, he is referred to by Jay Leno as "Ross the Intern".Ross Mathews (born September 24, 1979), well known as Ross the Intern, is an American television personality mostly known as the theatrical, falsetto-voiced  correspondent "Ross" of The Tonight Show with Jay Leno