Stefan Mazrocis (born 18 April 1967) is a Dutch-English former professional snooker player. He was born of Latvian and English parentage, and spent his early life in Leicester, England.

Career Mazrocis turned professional in 1991. In 1995, he qualified for the main stages of the World Championship at the Crucible Theatre, defeating Lee Walters, Martin Dziewialtowski, Jason Prince, Scott MacFarlane and Mark Bennett; drawn against incumbent champion Stephen Hendry in the last 32, he lost 3–10. He was a quarter-finalist at the 1996 Asian Classic.

In 1997, he qualified for the main stages of the World Championship, defeating Scott Rigg, Jason Wallace, Karl Payne, Jason Weston and Chris Small in qualifying, and was drawn to play Peter Ebdon in the first round. On this occasion, Mazrocis won 10–3, to reach the last-16 stage for the first time. His next opponent was Alain Robidoux; Mazrocis lost 9–13.

With this performance, Mazrocis rose to 65th in the world rankings, but he slipped back in the ensuing four years and lost his professional status in 2001 when ranked 122nd.

Having regained his professional status for 2008/2009 by winning the EBSA International Open in 2008, he defeated Chris McBreen and David Roe before losing to Barry Pinches in the third qualifying round of the 2008 Bahrain Championship.

Mazrocis' attempt to qualify for the World Championship in 2009 resulted in a 9–10 defeat to Tony Knowles in his first match.

Performance and rankings timeline Tournament 1990/91 1991/92 1992/931993/94 1994/95 1995/96 1996/97 1997/98 1998/99 1999/00 2000/01 2001/02 2002/03 2003/04 2004/05 2005/06 2008/09 2012/13 2013/14RankingFrom the 2010/2011 season it shows the ranking at the beginning of the season.He was an amateurNew players on the Main Tour do not have a ranking144112737281656592105Ranking tournamentsShanghai MastersTournament Not HeldLQAAUK ChampionshipA1RLQLQLQLQLQLQLQLQLQALQALQALQAAGerman MastersThe event was called the German Open (1995/1996-1997/1998)Tournament Not HeldLQLQLQNRTournament Not HeldAAWelsh OpenALQ1RLQLQLQLQ2RLQLQLQALQALQALQAAWorld OpenThe event was called the Grand Prix (1990/1991–2000/2001, 2004/2005–2005/2006, 2008/2009) and the LG Cup (2001/2002–2003/2004)ALQLQLQLQLQLQLQLQLQLQALQALQALQAATournament Not HeldDNQDNQChina OpenThe event was called the China International (1997/1998-1998/1999)Tournament Not HeldNRLQLQLQANot HeldLQALQAAWorld ChampionshipALQLQLQ1RLQ2RLQLQLQLQLQLQLQLQLQLQAANon-ranking tournamentsWorld Seniors ChampionshipNHATournament Not HeldLQLQThe MastersALQLQLQWDLQLQLQLQLQALQAAAALQAAFormer ranking tournamentsClassicALQTournament Not HeldStrachan OpenNHLQMRNRTournament Not HeldAsian ClassicThe event was called the Dubai Classic (1990/1991-1994/1995) and the Thailand Classic (1995/1996)ALQLQLQLQLQQFTournament Not HeldMalta Grand PrixTournament Not HeldNon-Ranking EventLQNRTournament Not HeldThailand MastersThe event was called the Asian Open (1990/1991-1992/1993) and the Thailand Open (1993/1994-1996/1997)ALQLQLQLQLQLQLQLQLQLQANRTournament Not HeldScottish OpenThe event was called the International Open (1992/1993-1996/1997) and the Players Championship (2003/2004)Not Held1RLQLQ1RLQLQ1RLQLQALQANot HeldMRNHBritish OpenALQLQLQLQ1RLQ1RLQ1RLQALQALQTournament Not HeldIrish MastersNon-Ranking EventLQALQTournament Not HeldMalta CupThe event was called the European Open (1990/1991-1996/1997 and 2001/2002-2003/2004), the Irish Open (1998/1999) and the Malta Cup (2004/2005-2005/2006)ALQLQLQLQLQLQNHLQNot HeldALQALQANot HeldNorthern Ireland TrophyTournament Not HeldNRLQNot HeldBahrain ChampionshipTournament Not HeldLQNot HeldFormer non-ranking tournamentsWorld Masters2RTournament Not HeldStrachan OpenNHRMRQFLQTournament Not HeldFinnish MastersTournament Not HeldFTournament Not Held Performance table legendLQ lost in the qualifying draw#R lost in the early rounds of the tournament(WR = Wildcard round, RR = Round robin)QF lost in the quarter-finalsSF lost in the semi–finalsF lost in the finalW won the tournamentDNQ did not qualify for the tournamentA did not participate in the tournamentWD withdrew from the tournament NH / Not Held means an event was not held.NR / Non-Ranking Event means an event is/was no longer a ranking event.R / Ranking Event means an event is/was a ranking event.MR / Minor-Ranking Event means an event is/was a minor-ranking event.

Career finals Minor-ranking finals: 1 Outcome No. Year Championship Opponent in the final ScoreRunner-up 1. 1992 Strachan Challenge - Event 1 Joe Swail4–9

Non-ranking finals: 4 (3 titles) Outcome No. Year Championship Opponent in the final ScoreRunner-up 1. 1996 Finnish Masters Rod Lawler 2–6Winner 1. 2001 Euro Tour – Event 2 Mario Wehrmann 3–2Winner 2. 2002 Euro Tour – Finals Mario Wehrmann 5–0Winner 3. 2003 Challenge Tour - Event 1 Paul Davison 6–2

Pro-am finals: 3 (3 titles) Outcome No. Year Championship Opponent in the final Score Winner 1. 1987 Pontins Spring Open Barry Pinches 7–2 Winner 2. 1995 Austrian Open Mike Henson 5–3 Winner 3. 2001 Austrian Open (2) Lee Richardson 5–3

Amateur finals: 8 (6 titles) Outcome No. Year Championship Opponent in the final Score Runner-up 1. 1987 World Under-21 Championship Jonathan Birch 1–4 Winner 1. 1988 EBSA European Snooker Championship Paul Mifsud 11–7 Runner-up 2. 1994 Danny Lathouwers 2–4 Winner 2. 2004 Dutch Amateur Championship Rolf De Jong 5–0 Winner 3. 2005 Dutch Amateur Championship (2) Gerrit bij de Leij 5–2 Winner 4. 2007 Dutch Amateur Championship (3) Gerrit bij de Leij 5–4 Winner 5. 2008 EBSA International Play-Off Lennon Starkey 4–2 Winner 6. 2009 Dutch Amateur Championship (4) Gerrit bij de Leij 5–3

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