He has represented businesses and governmental entities in complex civil litigation in federal and state courts.

He also served as General Counsel to the Kansas City Royals Baseball Club.

[2] He has also served as a Member, Board of Directors and Executive Committee, of the Providence Medical Center and St. John Hospital.

[3] On August 1, 2013, President Barack Obama nominated Crabtree to serve as a judge of the United States District Court for the District of Kansas, to the seat vacated by Judge John Watson Lungstrum, who assumed senior status on November 2, 2010.

[4] On April 11, 2014, Senate Majority Leader Harry Reid filed a motion to invoke cloture on the nomination.