<page_title> Shackleford (horse) </page_title> <section_title> Racing statistics </section_title> <table> <cell> July 31, 2011 </cell> <cell> Haskell Invitational </cell> <cell> Monmouth Park </cell> </table>
On July 31, 2011, Shackleford competed in the Haskell Invitational at Monmouth Park.