[3] Peter Williams was born in Wigan, Lancashire, England, and attended Upholland Grammar School.
[5] He worked as a physical education and history teacher, but later re-trained to become a physiotherapist when he began playing rugby league.
He won caps for England while at Orrell in the 1987 Five Nations Championship against Scotland and in the 1987 Rugby World Cup against Australia, Japan, and Wales.
[12] Williams played fullback (replaced by substitute Ian Blease) in Salford's 17–22 defeat by Wigan in the 1988 Lancashire Cup Final during the 1988–89 season at Knowsley Road, St. Helens on Sunday 23 October 1988.
[13] and played left-centre and scored a try in the 18–24 defeat by Widnes in the 1990 Lancashire Cup Final during the 1990–91 season at Central Park, Wigan on Saturday 29 September 1990.