Kieran Tierney. The left-back, now a Premier League star with Arsenal, progressed through the ranks at Parkhead having signed for his boyhood heroes aged just seven.
He went on to become a hero at the club during Brendan Rodgers' era of incredible domestic dominance before the Gunners paid £25million to take him down south.McStay admits he's always kept a keen eye on his development thanks to a little known family connection.
He says his father John was the man who first scouted the Scotland international as a kid and reckons he'll only enhance his reputation further at Euro 2020.
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