Reginald Quincy Arvizu (born November 2, 1969),[1] also known as "Fieldy", is an American musician, best known as the bassist for nu metal band Korn.

did succeed in signing a record deal, their success was limited until the band hired singer Jonathan Davis and changed their name to Korn.

His standard tuning is: A, D, G, C, F. He states Flea of the Red Hot Chili Peppers as being one of the main influences towards his playing style.

Korn began touring through Eastern Europe, Russia and India throughout August and September 2012 with fill-in bassist Ryan Martinie from Mudvayne.

On June 21, 2021, Fieldy announced that he would not be accompanying Korn on their upcoming tour, later taking an indefinite leave of absence from the band.

Fieldy was also working on his own clothing line 'Immanuel one twenty three'; when asked about it while backstage at the West Palm Beach stop of the Mayhem Festival in 2010, he stated that it was "much harder than he had previously expected" to start a clothing line, and has moved on to the side project that he can "be more proud of, opposed to his first solo CD under Fieldy's Dreams titled Rock'n Roll Gangster".

Got The Life: My Journey of Addiction, Faith, Recovery and Korn is a memoir Fieldy penned, which hit shelves March 10, 2009.