Dai Davies
... that a Welshman, Dai Davies, is the only person to have appeared in both the rugby league Challenge Cup final and the association football FA Cup Final?
... that a Welshman, <b id="mwGTY"><a class="mw-redirect" href="./Dai_Davies_(footballer_born_1880)" id="mwGTc" rel="mw:WikiLink" title="Dai Davies (footballer born 1880)">Dai Davies</a></b>, is the only person to have appeared in both the <a href="./Rugby_league" id="mwGTg" rel="mw:WikiLink" title="Rugby league">rugby league</a> <a href="./Challenge_Cup" id="mwGTk" rel="mw:WikiLink" title="Challenge Cup">Challenge Cup</a> final and the <a href="./Association_football" id="mwGTo" rel="mw:WikiLink" title="Association football">association football</a> <a href="./FA_Cup_Final" id="mwGTs" rel="mw:WikiLink" title="FA Cup Final">FA Cup Final</a>?