|Irish name||Caoimhín Ó Maoilsté|
|Born||1962 (age 54–55)
Castlebar, County Mayo, Ireland
|Height||5 ft 10 in (1.78 m)|
Born in Castlebar, County Mayo, McStay was introduced to Gaelic football by his father, a former player with the Tuam Stars. He played some Gaelic football at colleges' level with St. Muredach's College and St. Jarlath's College, however, he enjoyed little success before coming to prominence at under-age levels with the Ballina Stephenites club. A two-time championship medal winner with the Ballina Stephenites senior club, he later won a championship medal with Roscommon Gaels. McStay also lined out for Ballymun Kickhams.
McStay made his debut on the inter-county scene at the age of sixteen when he first linked up with the Mayo minor team. A two-time Connacht medal winner in this grade, he later won one All-Ireland medal with the under-21 team. McStay made his senior debut during the 1983 championship. He went on to play a key role for Mayo in attack during a successful era, and won two Connacht medals. McStay was an All-Ireland runner-up on one occasion.
As a member of the Connacht inter-provincial team on a number of occasions, McStay never won a Railway Cup medal. Throughout his inter-county career he made 17 championship appearances. McStay retired from inter-county Gaelic football after breaking his leg during the 1990 championship.
In retirement from playing McStay became an analyst with the Sunday Game, however, he remained involved as a manager and coach. At inter-county level he managed the Roscommon minor team before guiding the Mayo under-21 team to a Connacht title in 2001. As a club manager he steered Roscommon Gaels to championship success in 2004, before guiding St. Brigid's to the All-Ireland title in 2013. McStay was appointed joint-manager of the Roscommon senior team on 5 October 2015 and took over as the manager in October 2016.
- As of match played 2 May 2016.
|Roscommon||5 October 2015||Present||4||3||0||1||8||4||0||4||1||1||0||0||0||0||0||0||13||8||0||5||61.5|
- Keys, Colm (29 September 2015). "Kevin McStay delight as he lands joint-boss role with Roscommon". Irish Independent. Retrieved 3 May 2016.
- "Kevin McStay makes Best Mayo Team Since 1960". The Mayo News. 21 June 2010. Retrieved 4 August 2011.
- "Former Mayo star McStay takes St Brigid's reins". The Westmeath Independent. 7 March 2012. Retrieved 4 August 2011.
- "McStay wary of psychological pressure". Hogan Stand. 15 February 2013. Retrieved 15 February 2013.
- "Kevin McStay named as Roscommon's manager for next season". The 42. 21 March 2016. Retrieved 21 October 2016.
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