Sid Parkinson trained at the Robin Hood &amp; Thorpe Amateur Boxing Club (ABC), and was runner-up for the Amateur Boxing Association of England (ABAE) Junior Class-B title against B. R. Watkins (Ryde ABC) at The Standard Motor Company Ltd Hall, Coventry on Saturday 26 March 1955, he fought internationally for the Amateur Boxing Association of England, including a tournament against Poland at Empire Pool and Sports Arena, Wembley on Wednesday 20 November 1957 where he lost to 1957 European middleweight champion Zbigniew Pietrzykowski in a first-round knockout, his co-boxers that day included fellow Southpaws; Tommy Bache, Johnny Cunningham, Dick McTaggart, and Don Weller.