Career
Sinclair was signed to Bury, before making two Second Division appearances for Blackpool in the 1977-1978 season. He left Bloomfield Road and joined Portuguese Vale, initially on trial, in August 1978. He impressed enough to be offered a contract and was a regular first team player from February to April 1979, scoring two goals in 18 Fourth Division appearances in the 1978-1979 season.
However he was sacked by "Valiants" manager Dennis Butler in August 1979 after failing to report to Vale Park for the 1979-1980 season.
He had already joined Winsford United and later played for Ashton United and Kidderminster Harriers (Southern League).