McIlroy, a left-arm seamer from Hereford, made a number of appearances for Herefordshire in Minor Counties cricket in 2019.
He took 20 wickets in the competition and took a further 11 wickets for Glamorgan in the 2nd XI. He has been awarded his first professional contract for the 2019 season, and a subsequent deal for 2020 and 2021.
After impressing during the winter of 2020/21, McIlroy made his Glamorgan debut against Yorkshire in the opening game of the 2021 County Championship, taking the wicket of Matthew Fisher.
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