Sean Martin Long (born 2 May 1995) is an Irish professional footballer who plays as a full-back for League Two club Cheltenham Town.
Long joined Reading from Irish club Cherry Orchard in 2012. He made his professional debut on 26 August 2014. Long has represented the Republic of Ireland at under-16, under-17, under-18 and under-19 level. Long was called up to the under-21's for the first time in May 2015,