Date of birth
Republic of Ireland
Mark joined Town on loan from Arsenal in the 2020 summer transfer window.
The centre-half impressed for Arsenal U21 against Blues in an EFL Trophy tie, and was snapped up by Town following his performance at Portman Road.
Mark, who wears the number two shirt for Blues, received his first call-up to the Republic of Ireland U21s in November 2020, and made his debut in a 2-1 win over Luxembourg.
He scored his first goal for Town when he headed in at Burton in January 2021.