Smith previously competed full-time in the Craftsman Truck Series for GMS Racing, finishing as the championship runner-up in both 2020 and 2021.

Additionally, he has made part-time appearances in the NASCAR Xfinity Series with JR Motorsports and in Stadium Super Trucks.

[3] Building on his success in late model racing, Smith tested an ARCA Menards Series car with Mason Mitchell Motorsports at Daytona International Speedway in January 2016.

[13] He claimed his first victory in the second race of the season, outlasting teammate Sheldon Creed and overcoming three previous runner-up finishes.

[16] He later overtook teammate Chase Purdy with fewer than ten laps remaining to secure another victory,[17] with assistance from 2017 ARCA champion Austin Theriault, who served as his spotter at Toledo Speedway.

NASCAR Xfinity Series driver Scott Heckert expressed concerns about the safety implications of intentional wrecks.

Reflecting on the season, he revealed that his full-time campaign was not initially planned but became possible as his performance helped secure sponsorships for the remainder of the schedule.

[25] Smith joined GMS Racing for the full 2020 NASCAR Gander RV & Outdoors Truck Series season.

[26] On August 7, he earned his first career Truck Series victory at the Henry Ford Health System 200, overtaking Christian Eckes on the final lap in overtime.

[27] Two weeks later, he secured his second win at the KDI Office Technology 200, holding off Matt Crafton and Brett Moffitt on the final restart.

[29] In recognition of his impressive season, Smith received NASCAR Rookie of the Year honors and was voted the Truck Series' Most Popular Driver.

On October 30, he secured his third career Truck Series victory at the United Rentals 200 after Stewart Friesen spun Todd Gilliland in front of the field.

In the season finale, the Lucas Oil 150, Smith was passed with eight laps remaining and finished fifth in the race, ultimately placing second in the championship standings behind Ben Rhodes.

In May 2021, Smith made a one-off return to the NASCAR Xfinity Series as a substitute driver for Justin Haley, who was sidelined due to COVID-19 protocols.

[31] Smith began the season with a victory at Daytona, securing his fourth career Truck Series win after holding off Ben Rhodes in overtime.

[32] At Las Vegas, he initially finished second, but a post-race inspection revealed a lug nut violation, resulting in his disqualification.

The victory came after Alex Bowman collided with front runners Stewart Friesen and Kyle Busch, allowing Smith to capitalize.

In the playoffs, Smith advanced to the Round of 8 but was eliminated after being disqualified at Homestead when post-race inspection revealed unapproved windshield supports.

As part of the agreement, Smith would drive Spire Motorsports' third team in 2024, with plans to join Trackhouse full-time in a third car in 2025.

[41] This decision was reportedly due to his inconsistent performance and Trackhouse’s interest in promoting Shane van Gisbergen to the Cup Series.

[45] Smith and his teammate, Harrison Burton, secured victory at the 2023 IMSA Michelin Pilot Challenge event held at Daytona International Speedway.

* Season still in progress 1 Ineligible for series points (key) (Bold – Pole position awarded by qualifying time.