Grant was born in Ione, California, and took to midget racing at an early age. At sixteen, he was crowned the 2007 Bay Cities Racing Association (BCRA) Midget champion, an early signal of his raw pace in open-wheel short-track competition. In 2009, at eighteen, he relocated to Indiana — the geographic heartland of USAC racing — to pursue opportunities in sprint cars, initially living and working out of car owner Jeff Walker's shop.
Grant made his mark in the USAC National Sprint Car Series quickly after his Indiana arrival. In 2010, his first full season with car owner Kenny Baldwin, he was named USAC National Sprint Car Series Rookie of the Year. Over the following years he drove for a variety of owners, including Walker, Baldwin, Mark Hery, Rick Pollock, Andrew Elson, Tony Epperson, and Steve and Carla Phillips, accumulating experience across the Midwest's demanding sprint car venues.
The most transformative period of his sprint car career began at the tail end of the 2016 season when he joined Sam McGhee Motorsports. His form with the team was immediate and decisive: 18 top-five finishes in his first 21 USAC races with Sam McGhee, a run that repositioned him among the series' front-runners. He would ultimately claim the 2022 USAC National Sprint Car Championship.
Grant entered the USAC Silver Crown series in 2017 when car owner Chris Carli partnered with Hemelgarn Racing. That year he made history by becoming the first driver in USAC history to win the midget and sprint car series openers in the same calendar year. He was in position to extend that landmark by winning the Silver Crown opener as well, but engine trouble in the Sumar Classic at the Terre Haute Action Track ended that bid.
Grant claimed the 2020 USAC Silver Crown National Championship without recording a single feature win during the season — a testament to the consistency and points-accumulation strategy that can define championship campaigns in endurance-style Silver Crown racing.
Grant has been a consistent performer at the Chili Bowl Nationals, the prestigious indoor midget race held each January in Tulsa, Oklahoma. In the 2017 Chili Bowl, driving the number 39BC for Clauson-Marshall Racing, he won his preliminary qualifying night and started on the pole of the Saturday night feature, ultimately finishing third behind Christopher Bell and Daryn Pittman.
In 2019, competing with RAMS Racing/Rockwell Security in the 4a Bullet by Spike/SR-11, Grant again won his Friday night preliminary race and went on to finish third in the Saturday feature, this time behind Christopher Bell and Kyle Larson.
Grant's career spans every major USAC discipline — midget, sprint car, and Silver Crown — and he has won championships in both Silver Crown (2020) and Sprint Car (2022). His ability to compete at the front across three disciplines simultaneously, combined with signature Chili Bowl performances, marks him as one of the most versatile USAC open-wheel racers of his generation. His 2010 Rookie of the Year award in sprint cars and the subsequent championship a dozen years later trace an arc of sustained development through one of American motorsport's most demanding talent pools.