Dreckman began his career in as a National League umpire, but has umpired in both Major Leagues since . Prior to reaching the MLB, Dreckman umpired in the Appalachian League, Midwest League, Carolina League, Southern League, and American Association. Dreckman has worked the 2004, 2005, 2010, and 2011 National League Division Series, the 2009 and 2013 National League Championship Series, and the 2010 All-Star Game.