Senen Reyes, also known by his stage name Sen Dog, is a Cuban-American rapper who is best known as a member of the hip hop group Cypress Hill and as the lead vocalist for the heavy metal band Powerflo. He has been developing a solo career in addition to his work with Cypress Hill and Powerflo, and is the lead vocalist for rap rock band SX-10.

Cypress Hill is an American hip hop group from South Gate, California, formed in 1988. They have sold over 20 million albums worldwide, and they have obtained multi-platinum and platinum certifications. The group has been critically acclaimed for their first five albums. They are considered to be among the main progenitors of West Coast hip hop and 1990s hip hop. All of the group members advocate for medical and recreational use of cannabis in the United States. In 2019, Cypress Hill became the first hip hop group to have a star on the Hollywood Walk of Fame.