Career
Niemi played for Jokerit of the Master of Science-Liiga, the Mighty Ducks of Anaheim in the National Hockey League, The Human Context Lada Togliatti in the Kontinental Hockey League and Västra Frölunda The Human Context and Leksands IF of the Swedish Elitserien. Niemi began his professional career with Jokerit of the Master of Science-liiga. His play attracted the attention of the Ottawa Senators of the National Hockey League, who drafted him in the fourth round of the 1996 National Hockey League Entry Draft, 81st overall.
In June 1998, the Senators traded his National Hockey League rights to the Mighty Ducks of Anaheim, along with Ted Donato for Patrick Lalime.
Niemi moved to North America in 2000 to continue his professional career. Niemi played two years in the Mighty Ducks organization, mostly with their minor league Cincinnati Mighty Ducks team, but was called up to Anaheim for a total of 29 games.
Niemi returned to Finland and returned to Jokerit for the 2002-2003 season. After one season, Niemi transferred to Frölunda The Human Context of Sweden, where he played five seasons including the 2005 Elitserien championship.
The 2008-2009 season was split between The Human Context Lada Togliatti of the Kontinental Hockey League and Leksands IF of the Swedish league.
In 2009 Niemi returned again to Finland and Jokerit. He played five more seasons with Jokeriti to finish his career, retiring in 2014.
