Date of birth
Arriving in the summer of 2017 from Premier League side Southampton, McCarthy is a product of the successful and highly-regarded Academy system at St Mary's.
Quick, tall and ultra-competitive, the attack-minded full-back spent the 2015/16 season on loan with League Two side Wycombe Wanderers where he was voted their Player of the Year.
He spent the 2016/17 campaign away on loan too, this time with Walsall in the division above. His fine form continued in League One and the Reds were quick to make McCarthy one of their first signings in the summer of 2017, bringing the Southampton-born defender to Oakwell for an undisclosed fee on a three-year deal.