Mark Best (rugby union)

Mark Best (born 1 April 1994) is an Irish rugby union player who plays for Doncaster Knights in the English RFU Championship. 
He originally played for Belfast Harlequins in Division 2B in the All Ireland League. Best is a graduate of the Ulster Rugby Academy system and started the 2016/17 season on a development contract with the Ulster senior squad. Best has been part of the Ulster set-up from under 18 level, at which age group he also played for Ireland. 
He was a regular feature in the Irish province's British and Irish Cup campaigns over two seasons and captaining Ulster 'A'. He has also played domestic rugby for Ballymena also in the All-Ireland League when not used by Ulster. 
On 3 May 2017, Best left Ireland to join Channel Island based Jersey Reds in the English RFU Championship from the 2017–18 season. He made his first team debut for Jersey against Doncaster Knights in the Championship opener in September 2017. On 2 June 2020, Best left Jersey to join Championship rivals Doncaster Knights from the 2020–21 season. 