Last week, a Tesla shareholder filed a lawsuit accusing the company's chief executive, Elon Musk, and board of directors of neglecting worker complaints and fostering a toxic workplace culture.
Tesla has denied wrongdoing and says it has policies in place to prevent and address workplace misconduct.
Diaz alleged that his colleagues and a supervisor subjected him to a hostile work environment that included slurs, caricatures and swastikas in his nine months working at the Fremont plant in 2015 and 2016.
A jury had awarded Diaz $6.9 million of compensatory damages and $130 million of punitive damages last October, but Orrick in April said those numbers were excessive.
Diaz`s lawyers in their statement on Tuesday said Orrick`s decision highlighted systemic bias that federal judges have against juries, which in turn violates the constitutional rights plaintiffs have to a trial by jury.