I thought one of the more incredible streaks in boxing ended last week when Peter sent James Toney to the canvas. It was Toney's first knockdown in over 12 years, and even the knockdown against Roy Jones was half punch/half slip.
However, Toney has still never been stopped in 79 career fights.

Who are the other fighters of the modern era who have never been stopped?

Even most of the great fighters of the modern era have been stopped at least once in their career. Ali, Ray Leonard, Duran, Frazier, Foreman, Norton, Hearns, Trinidad, Barrera, Holyfield, Tyson, Morales, Pacquiao, Azumah Nelson, Lewis, De La Hoya, Chavez, Holmes, Spinks, were all stopped at one time or another.

Off the top of my head, the only longtime fighters who have never lost by KO or TKO are Toney, Hopkins, Mosley, Hagler, Bowe, Lopez. Whitaker lost by TKO in his last fight, but it was because he hurt his shoulder throwing a punch, he was never stopped by an opponent. Winky has never been stopped, although he was knocked down 5 times in a fight once.

I know guys like Mayweather, Taylor, Tarver haven't been stopped, but they haven't fought the same number of fights as the other guys. Let's make it a minimum of 40 career fights. Who else is on the list?