Peter Lines has enjoyed a long career playing snooker. He has appeared at the final of the English Amateur Championship, and in 1999 made it to the quarter-finals of the China Open. His success on the professional circuit began in 1991, when he turned professional. In the 1990s, he reached the quarter-finals in both the Strachan Open (Asian Open) and Strachan Open. 1998 was the first year he reached the televised stages at the World Championship.
Lines' career is largely unremarkable but his last few years have been quite impressive. Lines reached the top 64 of Order of Merit and even made it to the quarterfinals of a ranking competition for the first-time in his career. The best part of his season was his run in the German Masters. In which he reached the semifinals and almost won,
He was enjoying a promising start to the 2011/12 season but suddenly felt under pressure. As the season progressed he felt more pressure and began losing matches in his final four ranking events. He was just 57th in the European Tour rankings at the close of the year. Fortunately for him, he secured a place on the tour for a further year, and he was also able to make it to the qualifiers of the World Championship.
He won two more major tournaments and defeated Joe Perry and Ian McCulloch. He was also qualified for the Players Tour Championships (PTC), but his performance was not sufficient to keep him in main tour.
In 2010, he won his first UK Championship. However, he was relegated back to the PTC events in the 2015/16 seasons. In the end, he continued to participate in amateur tournaments.
Lines' behavior in a match with China Professional Billiards and Snooker Association (WPBSA), has been ruled unprofessional. The World Snooker Tour received Lines' complaint. They have launched an investigation. The World Snooker Tour received a formal complaint from Xiao Guodong's group. It is likely that the matter will be referred the World Snooker Tribunal.
The case was presented on December 16th and Lines was found guilty by the WPBSA. An interesting aspect of the fine was that Lines was found guilty by two rules related to player behavior.
The first rule involved his replacement of the white ball after a foul and miss award. It is not uncommon for professional players to temporarily hang up their cues in this situation. Brendan Moore, Lines' opponent, fought with him over the issue. They claimed Lines had made an erroneous statement, but Lines maintained that Moore was correct.
However, the World Snooker Tour claimed that Lines used "swear terms and intimidation" during their match. Lines threatened, likewise, to fight outside.