U.S. Open Cup Final
... that the finalists in tonight's U.S. Open Cup Final both joined Major League Soccer as expansion teams during the 2017 season?
... that the finalists in tonight's <b id="mwAXI"><a class="mw-redirect" href="./2019_U.S._Open_Cup_Final" id="mwAXM" rel="mw:WikiLink" title="2019 U.S. Open Cup Final">U.S. Open Cup Final</a></b> both joined <a href="./Major_League_Soccer" id="mwAXQ" rel="mw:WikiLink" title="Major League Soccer">Major League Soccer</a> as expansion teams during the 2017 season?<!--Special occasion hook for August 27-->