Career
Kaspars started playing basketball in his hometown Ogre. Later he played for Skonto Riga, debuting in 2002-2003 season. His role increased in 2003-2004, when he averaged 7.3 points and 3.3 rebounds for Skonto in the LBL and 7.3 points and 3.0 rebounds in the International Basketball Federation Europe League, now known as the International Basketball Federation EuroCup.
In both of those seasons Bērziņš played together with Andris Biedriņš.
In 2004 both of them left Skonto. Biedriņš was drafted in the National Basketball Association by Golden State Warriors, while Bērziņš moved to Spain where he joined Unicaja Málaga.
He briefly played for Unicaja"s first team, where he competed in one game in the ACB league, scoring two points, but most of the season spent with the junior team in the EBA, Spain"s second division. Foreign the 2004-2005 season Bērziņš moved back to Latvia, playing big role for Skonto.
Averaged 13.0 points, 6.1 rebounds and 1.0 blocks in 21.3 minutes in the LBL and 14.8 points and 8.3 rebounds in four EuroCup Challenge games.
After Skonto disappeared Bērziņš moved to ASK Group (a software company) Rīga, where he played in 2005-2006 season. 2008-2009 was best season with Barons, when he was team"s top inside presence for most of the season, averaging 14.0 points, 8.rebounds and 1.9 blocks in 28 games of domestic competition. In July 2009 Bērziņš participated in National Basketball Association Summer League, playing for Phoenix Suns.
After playing for Phoenix in Summer League Bērziņš signed contract with Spain"s ACB League club Fuenlabrada.
Later he also played for Cáceres Ciudad del Baloncesto, but in July 2010 signed two-year contract with VEF Rīgeorgia He re-signed with VEF Rīga for three more years in 2012.
In February 2014, he comes back to Spain for signing with Río Natura Monbús of the Spanish ACB League. On August 21, 2014, he signed with Krasnye Krylia from Russia.
He averaged 16.0 points, 10.0 rebounds and 1.1 blocks for Latvia at the 2005 International Basketball Federation Europe Under-20 Championship.