🇺🇸 Mason Diaz

Mason Diaz is a semi-professional stock car racing driver with a Racer Rating of 3,855, placing him in the semi-professional band. This rating describes a driver who competes in pro-am and one-make classes and runs mid-pack among full professionals; the level most paid drivers outside the top championships occupy. Diaz competed in the NASCAR Xfinity Series across three seasons from 2018 to 2020, starting six races and finishing with an average position of P27.8 and no wins or podiums.[1]

The competitive context of those starts tells the story. Diaz raced against an extremely strong field that included multiple elite professionals: Austin Cindric and Justin Allgaier, both former champions rated at the elite level; Brandon Jones, Christopher Bell, and AJ Allmendinger, all established professionals well above the 5,000 rating threshold. Across six shared races with Cindric, a two-time champion and FIA Silver graded driver, Diaz finished behind him in every encounter. He finished outside the points in all six races against Jones and failed to outscore Allgaier in five of their six meetings. Diaz did finish ahead of Allgaier once and beat established professionals Ty Majeski, Christopher Bell, and AJ Allmendinger in single races each, but these isolated results against much stronger drivers do not constitute a pattern and do not offset a head-to-head record that shows him consistently outpaced by the field.[2]

Diaz's professional career in the top tier ended in 2020. Recent activity indicates he returned to racing at lower levels; recent headlines from 2024 and 2025 place him in the CARS Tour and ARCA Menards Series East, where he continues to compete part-time.