Derek Foster (rugby league)

Derek Foster is a former professional rugby league footballer who played in the 1960s, 1970s and 1980s. He played at club level for Castleford, and York, as a or.

County Cup Final appearances
Derek Foster played on the and scored a try in Castleford's 7-11 defeat by Hull Kingston Rovers in the 1971 Yorkshire Cup Final during the 1971–72 season at Belle Vue, Wakefield on Saturday 21 August 1971, and played at  in York's 8-18 defeat by Bradford Northern in the 1978–79 Yorkshire Cup Final during the 1978–79 season at Headingley, Leeds on Saturday 28 October 1978.

Career records
Castleford's most tries scored in a match record is 5-tries, and is jointly held by; Derek Foster against Hunslet on 10 November 1972, John Joyner against Millom on 16 September 1973, Stephen Fenton against Dewsbury on 27 January 1978, Ian French against Hunslet on 9 February 1986, and St. John Ellis against Whitehaven on 10 December 1989.