[15][16] After impressive cameos in Torquay's pre-season fixtures, Sullivan was named as a substitute (having seemingly overtaken Ashley Yeoman in the striking roster) for the opening game of the season against AFC Wimbledon on 3 August.
[17] He made his senior debut a week later as a late substitute in the 1–1 draw at Morecambe, becoming the 999th player to play for Torquay since they joined the Football League in 1927.
[18][19] On 13 August, Sullivan scored twice in a 3–2 friendly win over Cheltenham Town – one with either foot – prompting Knill to admit, "When I watched Danny last year, I wasn't totally convinced, but he's earned our confidence this season.
[23] A week later he replaced Jordan Chapell late in the 1–0 loss at Rochdale, but Sullivan had to wait until mid-November for his next appearance, again as a substitute in the 2–0 home reverse against Chesterfield.
[26] With Torquay relegated to the Conference, Sullivan made his first appearance of 2014–15 as a late replacement for Duane Ofori-Acheampong in United's 1–1 draw with Aldershot on 25 August 2014.