Sidney Ernest Rowland Castle (12 March 1892 in Basingstoke – 27 January 1978) was an English professional footballer who played for Basingstoke Town, Thornycroft Athletic, Guildford United, Tottenham Hotspur, Charlton Athletic, and Chelsea.

[2] After playing for Basingstoke Town, Thorneycrofts and Guildford United, the outside right joined Tottenham Hotspur.

[3] He signed for Charlton Athletic in 1921 and went on to play in 66 matches, scoring 10 goals.

In 1923, Castle signed for Chelsea, where he featured in a further 33 games and found the net twice.

[4] He rejoined Guildford United, where he ended his playing career.