|Full name||Ross Leon Gaynor|
|Date of birth||9 September 1987|
|Place of birth||Ardee, County Louth, Ireland|
|Height||1.78 m (5 ft 10 in)|
|Playing position||Left back
|2007||→ Sutton United F.C. (loan)||?||(?)|
|2009||→ Drogheda United (loan)||15||(1)|
|Republic of Ireland U17|
|Republic of Ireland U19|
|2007||Republic of Ireland U21||2||(2)|
|2010||Republic of Ireland U23||1||(0)|
* Senior club appearances and goals counted for the domestic league only and correct as of 21:30, 2 August 2015 (UTC).
Gaynor began his career playing juvenile football in Ardee with Square United and Ardee Celtic before moving on to Belvedere .
Gaynor made his name when he won the Golden Boot in the Milk Cup playing for the Dundalk Schoolboys League side when he was just 14. He went on to have trials with Manchester City and Aston Villa but opted to begin his career with Millwall. Gaynor later joined Sutton United on loan in 2007 but was released at the end of the 2007–08 season, subsequently joining Cobh Ramblers. Gaynor then signed for Sporting Fingal in December 2008 for the season, but joined Drogheda United on loan in July 2009. On 9 February 2010 he signed for Dundalk.
In December 2011, Gaynor signed for Sligo Rovers. Despite starting out on the wing he eventually settled into the left back position due to an injury to regular left back Iarfhlaith Davoren. He was an important part of the defence that secured a first league title in 35 years for Rovers while also providing several assists.
He made a good start to the 2013 season again in the left-back position and scored his first league goal for the club in the home win over Derry City. An injury towards the end of the year restricted his appearances but he added an FAI Cup winners' medal to his collection coming on as a sub in the 3–2 win against Drogheda in the final.
He also has scored on his debut for the Irish under 17s 19s and 21s.
- Sligo Rovers
- "International Roll Of Honour". www.belvederefc.com. 2 February 2016. Retrieved 2 February 2016.
- Gaynor joins Sligo Rovers
- Late comeback by U23s not enough against England From FAI.IE 27 May 2010.