| Born | April 18, 1967 |
|---|---|
| Sport country | Netherlands |
| Professional | 1991 |
| Highest <dfn style="border-bottom:1px dotted #0645AD; font-style:inherit;">break</dfn> | 147 (1995 WPBSA Tour Event 3) |
| Best ranking finish | Quarter Final: 1996 Asian Classic |
Stefan Mazrocis (born 18 April 1967, Kerkdriel) is an international standard Dutch amateur snooker player. He was born of Latvian/English parentage, spent his early snooker years of snooker in Leicester, England honing his snooker skills. He has recorded three maximum breaks in a single day. He beat Peter Ebdon in the 1st Round of the 1997 World Snooker Championship. Mazrocis reached the round of 32 at the 2006 IBSF World Championships in Amman, Jordan, where he was eliminated by Rafal Jewtuch 5–2.
Mazrocis is back on the main tour for the 08/09 season following his success at the 2008 EBSA European Play-Off.