After three seasons at Old Trafford, Thomas had short spells at Everton and Brighton & Hove Albion before joining Stoke City in August 1982.
He moved back to England in 1988 to play for Shrewsbury Town and Leeds United before making returns to Stoke City and Wrexham.
Though the first two years were spent cleaning boots, the changing rooms and the whole stadium, Thomas made his first-team debut in the 1971–72 season, when still only 17.
After helping Wrexham storm to the Third Division title in 1977–78, Thomas crossed the border to England and joined Manchester United.
[1] He instantly became a favourite at the Victoria Ground and top-scored in 1982–83 with 12 goals coming from left wing and he won the player of the year award.
He was sold to West Bromwich Albion in 1985 for £100,000 where he played 28 times scoring once and also had a short loan spell at Derby County.
In 1986 Thomas moved to the United States where he lent his skills to the Wichita Wings in the Major Indoor Soccer League.
[1] He was released at the end of the season by Lou Macari and returned to Wrexham in 1991, where in the memorable FA Cup defeat of Arsenal in January 1992, 37-year-old Thomas scored the equalising goal from a free kick.