#1 Tank Abbott - FRIENDS
We finish off with what I consider as the Holy Grail of UFC stars making cameos on television shows. The year was 1997 and FRIENDS was one of the top shows on television. The 24th episode of season 3 saw Monica Geller's then-boyfriend Pete training to fight in the Octagon.
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After a brutal training regiment, Pete finally got inside the Octagon to face none other than Tank Abbott. The fight was brief and Pete lost it in a matter of minutes. Abbott was one of the most famous UFC fighters in the late 90s and his appearance on FRIENDS only helped increase his mass appeal.
Abbott is also known for his unsuccessful run in World Championship Wrestling at the turn of the century. There are also rumors that then-booker of WCW, Vince Russo, wanted to put the World Heavyweight Championship on Abbott and this led to Russo getting fired.