William A. Brady
...that William A. Brady is the only person to have managed two undisputed heavyweight champion boxers?
...that <b id="mwDJo"><a href="./William_A._Brady" id="mwDJs" rel="mw:WikiLink" title="William A. Brady">William A. Brady</a></b> is the only person to have managed two undisputed <a class="mw-redirect" href="./Heavyweight_champion" id="mwDJw" rel="mw:WikiLink" title="Heavyweight champion">heavyweight champion</a> boxers?