Crockett started his professional career at Bath.
He was called into the England Saxons squad to face Italy A in Ragusa, Sicily on 9 February 2008.[2][3]
He was appointed joint captain (with Michael Lipman) for Bath in the 2008/9 season[4]
Crockett resigned from Bath along with co-captain Michael Lipman, and Andrew Higgins on 1 June 2009[5][6]
On 4 December 2009, it was announced that Crockett had signed a contract with Bristol which will last until the end of the 2009/10 season. Crockett joined Bristol for training in January but was unable to play a competitive game until 1 March 2010.[7]
His first game for his new club came against Nottingham in the British and Irish Cup on 7 March 2010. Bristol won the game with Crockett scoring a try in the first half.[8][9]
Crockett signed for Worcester Warriors on 2 June 2010 on a two-year deal.[10] In 2012, it was announced Crockett would leave Worcester Warriors at the end of the season.
On 23 May 2012, Crockett signed for Newcastle Falcons on a two-year contract for the 2012 to 2013 season.[11] On 20 May 2014, Crockett announced his retirement from professional rugby.[12]