Watts began his professional career at Fulham without playing a XI fixture before on 2nd October 2009 he agreed to join Lincoln City on an initial month's loan,becoming newly installed managed Chris Sutton's first signing for the club.
He made his debut in the club's 1-0 home victory over Aldershot Town the following day and, after helping his side to two clean sheets in his first two games, his loan was extended until 2 January 2010.
Having impressed during his loan period, on 31 December 2009 the club announced that Watts had agreed terms on a permanent contract with the Imps that would run until the summer of 2012, joining for an undisclosed fee.
On 20 February 2010 his season was ended when he suffered a fracture of his left fibula in the 2-2 draw at Grimsby Town, the injury seeing him undergo surgery to pin the fracture. In May 2011, he was made available on a free transfer by the club, after a mass clear out of players following relegation from the Football League. On 27 December 2011 he departed Sincil Bank by mutual consent.
Adam then signed with Conference North side Gainsborough Trinity on 6 January 2012 He was amongst the Trinity side that missed out on promotion to the Conference National after defeat to Nuneaton Town in the play-off final, before now moving to The Sports.