Michael Duff, Irish footballer
Michael James Duff (born 11 January 1978) is a Northern Irish professional football manager and former player. In a career spanning from 1995 to 2016, in which he made over 700 appearances, he played as a defender for Carterton Town, Cheltenham Town, Cirencester Town (on loan) and Burnley. At international level, Duff earned 24 caps for Northern Ireland. Since 2018, he is the manager of EFL League One club Cheltenham Town, having previously managed the Burnley reserves for two years.

Duff led Cheltenham Town to their first ever automatic promotion from League Two as manager on 27 April 2021. His team subsequently finished the season as League Two champions.

He is believed to be the only player to have played in each of the top eight tiers of English football in ascending order.