Ronald Ray Bruner Jr. (born October 5, 1982) is an American drummer, composer and producer. He has played with hardcore punk/crossover thrash band Suicidal Tendencies. Bruner was part of the band that received a Grammy Award for Best Contemporary Jazz Album in 2010 for The Stanley Clarke Band.

He is the older brother of musicians Stephen Bruner (better known as Thundercat) and Jameel Bruner (also known as Kintaro). He frequently performs alongside Thundercat, Kamasi Washington, and cousin Terrace Martin as a member of the Los Angeles jazz collective West Coast Get Down. In 2015, he appeared with the collective on Washington's major-label debut album, The Epic.