William John "Nipper" Truscott Jr. (9 October 1886 in Lithgow, New South Wales – 20 June 1966 in East Fremantle, Western Australia[1]) was an Australian sportsman.

He moved with his family to Kalgoorlie on the Western Australian Goldfields at the age of 14, and began playing for the Trafalgar Football Club's junior side.

Lithgow born Truscott was a doyen of West Australian football, and an all round sportsman, once representing Western Australia in a first-class cricket match as a wicket-keeper and also playing bowls.

[2] Nicknamed 'Nipper' as a boy for his quickness in Rugby Union, he grew up in Sydney, only taking up Australian rules football when his family moved to the goldfields in Kalgoorlie, Western Australia in 1899.

He commenced in the 1913 season with the East Fremantle Football Club, and quickly established himself as the WAFL's leading centreman.