Houston Astros manager
... that Larry Dierker is the only Houston Astros manager to have had his uniform number retired by the Houston Astros franchise of Major League Baseball?
... that <a href="./Larry_Dierker" id="mwHDI" rel="mw:WikiLink" title="Larry Dierker">Larry Dierker</a> is the only <b id="mwHDM"><a href="./List_of_Houston_Astros_managers" id="mwHDQ" rel="mw:WikiLink" title="List of Houston Astros managers">Houston Astros manager</a></b> to have had his <a class="mw-redirect" href="./Squad_number#Retired_numbers" id="mwHDU" rel="mw:WikiLink" title="Squad number">uniform number retired</a> by the <a href="./Houston_Astros" id="mwHDY" rel="mw:WikiLink" title="Houston Astros">Houston Astros</a> franchise of <a href="./Major_League_Baseball" id="mwHDc" rel="mw:WikiLink" title="Major League Baseball">Major League Baseball</a>?