Tulis hiji neraskeun pikeun ayat ieu - Cooper jadi hiji wasit permanén Liga Utama Baseball dimimitian dina 1999. Manéhna digawé di Divisi Series (2003, 2005, 2006, 2008, 2009, 2011, 2012, 2013, 2014, 2019), Liga Championship Series (2004
, 2015, 2016, 2017), Kaulinan Kartu Liar Baseball Liga Utama (2015 jeung 2016, 2017), World Series 2014, jeung All-Star Game 2005. Cooper ogé digawé di World Baseball Classic dina taun 2009 jeung 2013.