 He signed a one-year professional contract with Scarborough on 5 April 2005 and finished 2004–05, his first in senior football, with two goals in 14 appearances.During pre-season Scarborough manager Nick Henry stated his hope that Coulson, along with fellow youngster Ryan Blott, would fill the gap left by some high-profile departures in the summer.His first goal of 2005–06 came after scoring an 87th-minute equaliser in a 1–1 draw away to Altrincham on 20 September 2005, having entered the match as a second-half substitute.