Sam John Byrne (born 23 July 1995) is an Irish professional footballer who last played as a forward for UCD. Born in Dublin, he began his career with St. Joseph's Boys before joining Manchester United in July 2011. He has also represented the Republic of Ireland at every youth international level from under-15 to under-19. His brother is Connacht Rugby player Adam Byrne. Club career After beginning his career with St. Joseph's, Byrne joined Manchester United in July 2011, entering the club's academy as a first-year scholar. He made his debut for the club's under-18 team away to Southampton on 27 August 2011, but it took three months for him to score his first goal, which came against Liverpool on 25 November 2011. He soon became a regular starter for the under-18s and went on to score four goals in 28 appearances in his first season with the club. The 2012–13 season began slowly for Byrne as he scored just two goals in 11 appearances before the turn of the year; however, five goals in the second half of the season – including braces against Fulham and Southampton – earned him plaudits from coach Paul McGuinness. In 2013–14, Byrne played in all six of Manchester United's UEFA Youth League group matches but was unable to get on the scoresheet as United finished bottom of Group A and were eliminated from the competition. On 31 January 2014, he was loaned to Carlisle United with team-mate Charni Ekangamene. He made his professional debut the next day, coming on as a substitute against Bristol City. On 23 May 2014 Byrne was released by Manchester United, and joined Everton on a free transfer on 18 July. At the start of the 2018 season, he joined League of Ireland Premier Division side Dundalk on loan before signing permanently for the club on 9 July 2018. On 16 August 2018, he joined Glentoran on loan. On 30 January 2019, it was announced that Byrne had signed for Bohemians for the 2019 season; he had scored a penalty in a 4–0 friendly win against Longford Town the previous night. Byrne made eight competitive appearances for Bohemians, scoring once. In July 2019, he signed for UCD. International career Byrne has represented the Republic of Ireland at under-15, under-16, under-17 and under-19 levels. He made his debut for the under-15s as a left-winger in a match against the Aspire