Siddall was educated at Ellesmere Port Grammar school; where he was spotted by a Bolton scout, together with Paul Jones and Neil Whatmore.[4] He played seven games for England Youth in 1973.[5]
In August 1982, Siddall signed for John McGrath's Fourth Division Port Vale and went on to make 81 league appearances for the "Valiants" in a two spell.[1] The first choice keeper in the 1982–83 promotion campaign, he was sidelined for three months after sustaining a knee injury in a 3–1 win over Bristol City at Ashton Gate on 27 December 1982; Neville Southall was signed on loan to take his place.[1] Teammate and club legend Phil Sproson named Siddall as the club's best goalkeeper of the 1980s.[6] However, he handed in his notice at Vale Park in October 1983 following a contract dispute, and was loaned to Sam Ellis's Blackpool. Despite only spending one month at Bloomfield Road, during his seven league games for the "Seasiders", Blackpool were the victor in six of them, which assisted in their finishing sixth in the Fourth Division. He ended the 1983–84 season with 45 appearances for Port Vale, though he could not prevent the club from suffering relegation out of the Third Division.[1] He was in goal for Vale against Blackpool in a 1–1 draw on 18 September 1984. Still, his return to Bloomfield Road was unhappy as he injured his ankle.[1] He featured just 12 times in the 1984–85 season, as new boss John Rudge preferred Chris Pearce.[1]
Siddall was loaned out to Vale's rivalsStoke City in January 1985, and the move was made permanent two months later. He played 15 First Division games at the end of the 1984–85 season, though he could not prevent Bill Asprey's "Potters" from being relegated in last place. He featured in just five Second Division games at the Victoria Ground in the 1985–86 campaign, as new boss Mick Mills preferred Peter Fox. He was also loaned out to Frank Worthington's Tranmere Rovers and Billy McNeill's Manchester City during the season, keeping goal in 12 Fourth Division games at Prenton Park and playing six First Division games during his time at Maine Road.
In 1986, Siddall returned to Blackpool, this time permanently. Sam Ellis was still in charge of the Bloomfield Road club, now a division higher, and Siddall went on to make 37 appearances during the 1986–87 season, as the club finished ninth in the Third Division. He was also first-choice during 1987–88, making 38 appearances, but in 1988–89 he was dropped a couple of times in favour of his deputies, Gary Kelly and Vince O'Keefe. He still made 35 starts in the league but was sold at the end of the season to Stockport County.
^ abcDykes, Garth; Lamming, Doug (2000). All the Lads: A Complete Who's Who of Sunderland AFC. Great Britain. p. 391. ISBN9781899538157.{{cite book}}: CS1 maint: location missing publisher (link)
^Barry Siddall at Post War English & Scottish Football League A–Z Player's Transfer Database