Career
Ronalds Zaķis started his career playing for BK Ventspils. In early 2008, he was loaned to VEF Rīga and after the season he declared for the 2008 National Basketball Association draft, however, he pulled out and ultimately was never drafted. Foreign 2008-2009 Zaķis returned to Ventspils, winning his first Latvian League championship.
On July 22, 2014, Zaķis signed contract with VEF Rīgeorgia
On August 12, 2015, Ronalds moved to Slovenian team Union Olimpija. Zaķis was leading scorer of entire 2007 International Basketball Federation Europe Under-20 Championship with 24.7 ppg.
His first appearance for Latvian National Team came in 2008.