Initially he was a frequently used substitute at Liverpool, and he was in the team which lost the 1987 League Cup final to Arsenal before his big year arrived. This was the year when Liverpool played what observers now cliché as "total football", earning praise from distinguished retired professionals like ex-France skipper Michel Platini and former England winger Tom Finney. Spackman only had a regular role in the Liverpool team during this season, but played an essential role.
When regular midfield general Ronnie Whelan was injured early in the campaign, Spackman was handed his No.5 shirt and he never missed a game for the whole campaign, gaining respect and plaudits for his unselfish running and industry around the park. Not the most glamorous player in a team which featured the likes of John Barnes, Peter Beardsley and John Aldridge, Spackman was quickly identified as an unsung hero beyond the appreciation of the Liverpool supporters, who loved him.
Liverpool lost just twice in the League championship all season, claiming the title with ease and Spackman was in the side which played what remains arguably Liverpool's finest club performance in English football when they beat Nottingham Forest 5–0. Spackman's stamina and unselfishness set up the last goal for Aldridge. Whelan was fit again with a month of the season left, but wasn't selected. Spackman was selected for the rest of the campaign, including the FA Cup final, which Liverpool surprisingly lost to Wimbledon. Spackman and team-mate Gary Gillespie both played that game with flamboyant bandages around their heads after the two had suffered cuts in a clash during a game against Derby County the previous week.
He left Liverpool for Queens Park Rangers in 1989 and subsequently played for Scottish side Rangers (1989–92), winning honours there. He went back to Chelsea in 1992 before moving to Sheffield United in 1996 as player-coach and assistant-manager to Howard Kendall.
He later managed Barnsley between January and October 2001 but was sacked with the club near the bottom of the table. They were relegated at the end of that season. He re-entered management with in May 2006 but left only a few months later in September, with the club in the relegation zone of League One. As of 2008, he has failed to manage any club for a full season.
Spackman's departure from the Barnsley manager position led to the use of his name as an internet messageboard term, when the news of his being sacked by Barnsley was reported on the qpr.org message board. It was posted throughout the day by various members of the forum, in and one last time much later in the day by one Tracy Stent. 'Spackman sacked' (more recently simply 'Spackman' subsequently became a metaphor for a messageboard post that has already been made by another poster. It has spread across most QPR message boards, as well as some other football boards and has made a brief appearance on a few non-football boards, much to the bewilderment of the Americans who dominate most of them. 'Spackman' is now a noun (describing the offending post) and a verb ("to Spackman" - to make such an offending post).
Despite playing the majority of his career with Chelsea FC and having a stadium entrance at Stamford Bridge named after him, Spackman commented before the Champion's League semi-final between Chelsea and Liverpool (30/04/2008): "My loyalties have always been with Liverpool, though I don't give that away too easily," he revealed. "That is actually why I am not going to the game, because there is so much pressure. I just hope Liverpool will pull through and we play Man Utd in Moscow."
He was married for 22 years to Nicola Spackman, but they sadly got divorced in 2006. Together they had 3 children Hannah 22 and twins Beth and Frazer 14. The children live with their mother in Berkshire.