Paul Michael Lyons McStay, MBE (born 22 October 1964) is a Scottish former professional footballer who spent his entire career with Celtic, making his senior debut in 1982 and retiring in 1997.

[5] Season 1982–83 saw the young midfielder establish himself as a first team regular,[5] and he picked up his first winners medal on 4 November 1982 in Celtic's 2–1 win over Rangers in the League Cup Final.

His performances resulted in media speculation that Inter Milan were considering making a £2 million bid to take him to Italy, a rumour that was emphatically dismissed by the Celtic chairman, Desmond White.

However, Celtic had played most of the match with 10 men after Roy Aitken was sent off in the first half, and Aberdeen scored in extra time to win 2–1.

He went on to enjoy his finest season,[6] winning both the SPFA and Scottish Football Writers player of the year awards as the club won a League and Cup double in 1988.

[5] When Roy Aitken left Celtic Park in 1990, McStay was appointed club captain, a position he retained until his retirement following the 1996–97 season.