John McEnroe
From OAPedia.com
John McEnroe is a legend in the world of professional tennis. When Opie and Anthony returned to radio following their two-year suspension, they were guests on McEnroe's short-lived talk show on CNBC. Unfortunately, their appearance coincided with the final game of the 2004 World Series, where the Boston Red Sox won their first championship in 86 years. No one watched them on the show (but then again, the show wasn't much of a hit in the first place). McEnroe also appeared on O&A at the time as well.