Following a youth career at Rangers, Kilmarnock and Bonnyton Thistle, Thomas joined Morton in 2011, initially as an Under-19s squad member.
He made his first-team debut as a left-back against Highland League outfit Deveronvale in the Scottish Cup in November of that year.
Thomas has featured at full-back, centre-back, centre midfield, and occasionally as a striker during his five seasons with the club and signed a new two-year contract at the end of 2015/16 season.
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