Here we look at the major ups and downs in his career on the baize - a career that could now be over after receiving a 12-year ban having been found guilty on seven charges of match fixing.
1974: Born October 12 in Trowbridge, Wiltshire.
1992: Turns professional.
1998: Wins first ranking tournament, the Grand Prix, defeating Marco Fu 9-2 in the final.
2002: Wins Scottish Open and Grand Prix and takes over as provisional world number one early the following season.
2003: Best run in the World Championship, reaching the semi-finals.
2005: Marries long-term partner Laura.
2008: Records highest tournament break, a 145, in the Northern Ireland Trophy.
2006: Enters Welsh Open outside the provisional top 16 after a poor run of form but wins the tournament, beating Shaun Murphy 9-4 in the final.
2008: Loses in first round of World Championship and contemplates retirement.
2010: Arrested by West Midlands Police in relation to an investigation by the Gambling Commission over suspicious betting patterns.
2011: October - Returns to top 16 of world rankings.
2012: March - Reaches first final since 2006 but loses to Mark Allen 10-1 in World Open. Two weeks later wins first major professional title in six years - his fifth overall - by beating Neil Robertson 4-0 in the final of the Betfair PTC Grand Finals.
October 2 - Crown Prosecution Service announce there will be no criminal proceedings in the match-fixing allegations against Lee made in 2010. WPBSA starts its own investigation into these allegations.
2012: October 11 - Loses 4-2 to John Higgins in Premier League match.
October 12 - WPBSA confirm Lee suspended from action while investigations into suspicious betting patterns in the previous night's match against Higgins take place.
October 24 - Lee's appeal against the suspension is dismissed by the World Professional Billiards and Snooker Association.
2013: February 14 - The WPBSA announce Lee has "a case to answer" over allegations of match-fixing at four tournaments.
September 16 - Found guilty of fixing seven matches by the WPBSA.
September 25 - Given a 12-year ban and ordered to pay £38,000 costs after being found guilty of seven charges of match-fixing.