Career
Berezin started his career in 2007 with the Neftekhimik Nizhnekamsk of the third level Pervaya Liga as a seventeen-year-old, where he scored 13 points in 38 games. He would spend most of his 2008-2009 season in the second level Vysshaya Liga playing with Neftyanik Leninogorsk, scoring 6 pts in 32 games. He would split his next two seasons between Reaktor Nizhnekamsk of the Molodezhnaya Khokkeinaya Liga and Neftekhimik Nizhnekamsk of the Kontinental Hockey League.
Berezin would score a career high in points (36) during his 2009-2010 stint with Reaktor Nizhnekamsk.
In seven games, he did not score but had three assists and eight penalty minutes.
