Zach Mercer (born 28 June 1997) is an English rugby union player who plays as a number eight or a flanker for Gloucester in the Gallagher Premiership.

He left at the end of his third year and then he attended Merchiston Castle School and played for Glasgow Hutchesons Aloysians.

[8][9] On 30 August 2022, it was confirmed that Mercer would return to England to re-join the Premiership Rugby with Gloucester on a long-term deal ahead of the 2023–24 season.

[12] Mercer also captained the team at the 2017 Junior World Cup,[3] scoring the winning try in the semi-final against South Africa.

[14] Mercer received his first call up to the England national rugby union team for the 2017 Autumn Internationals, however coach Eddie Jones made it clear he would be treated as an apprentice player in the squad.

[17] Mercer was selected to make his England debut[18] against South Africa in the 2018 Autumn Internationals after Ben Morgan was dropped.