|Date of birth||16 July 1991|
|Place of birth||Glasgow, Scotland|
|2010||→ Annan Athletic (loan)||2||(0)|
|2011||→ Girvan (loan)|
|2012||East Kilbride Thistle|
|2016||→ East Kilbride Thistle (loan)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 21:29, 12 October 2014 (UTC).
Connolly came through the pro youth set-up at Ayr United and made his Scottish Football League Division One debut against Ross County in January 2010. He had a brief loan spell at Annan Athletic in late 2010 before joining Junior side Girvan for the rest of the season.
In July 2015 Connolly joined Lowland League side BSC Glasgow, signing a two-year contact. He left the club in December 2015, following the departure of manager Craig Young, and joined East Kilbride.
- "Ross County 1-0 Ayr United". BBC Sport. 23 January 2010. Retrieved 12 October 2014.
- "Deano could be out for season". Ayr Advertiser. 3 November 2010. Archived from the original on 17 October 2014. Retrieved 12 October 2014.
- Wilson, Mike (14 January 2011). "Ayr United sign Girvan striker Michael Moffat". Ayrshire Post. Daily Record. Retrieved 12 October 2014.
- "BSC Snatch striker Connolly". BSC Glasgow F.C. 28 April 2015.
- Thomson, Paul (24 December 2015). "Duo snapped up by East Kilbride after quitting BSC Glasgow". Daily Record. Retrieved 16 December 2017.
- Thomson, Paul (17 March 2016). "Connolly feeding off confidence at East Kilbride Thistle as he scores on debut". Daily Record. Retrieved 16 December 2017.
- Paterson, Colin (5 July 2017). "East Kilbride Thistle can be shock troops this season, says boss Alan Paterson". Daily Record. Retrieved 16 December 2017.