Culbreth has umpired in the American League Division Series in 2002, 2007, 2012, and 2014; and the National League Division Series in 2004 and 2008. He officiated in the American League Championship Series in 2000, 2009, 2010 and 2011; and the National League Championship Series in 2003, 2006 and 2019. Culbreth umpired in the World Series in 2008 and 2012. Culbreth has officiated in 87 postseason games through the 2019 season, being the plate umpire for 11 of those contests. He was also a member of the crew for the 2006 MLB All-Star Game in Pittsburgh. The American League defeated the National League, 3–2.