The Elliotts are the third father-son duo in NASCAR history to win championships, joining Lee and Richard Petty, as well as Ned and Dale Jarrett.

[6][7] In 2012, Elliott added to his achievements by winning the Alan Turner Snowflake 100, the Snowball Derby's prelude race, for the second time in three years.

However, during a post-race inspection, his car was found to contain a prohibited piece of tungsten, resulting in his disqualification and the victory being awarded to Erik Jones.

For ARCA, the minimum age for ovals longer than 1.25 miles (2,000 meters) is 18, while shorter tracks and road courses allow drivers as young as 16.

[12] During qualifying for the UNOH 200 at Bristol Motor Speedway, Elliott earned his first career NASCAR pole position with a lap speed of 125.183 mph (201.463 km/h), becoming the youngest pole-sitter in Truck Series history.

[17] Elliott secured his first career win in the Chevrolet Silverado 250 at Canadian Tire Motorsport Park, the first road course race for the Truck Series held outside the United States.

Elliott veered into the grass but managed to recover and cross the finish line ahead of Chad Hackenbracht from Kyle Busch Motorsports.

[27] On April 4, 2014, Elliott earned his first series win at the O'Reilly Auto Parts 300 at Texas Motor Speedway, holding off Kevin Harvick and Kyle Busch after taking the lead with 16 laps remaining.

[39] During the race, Elliott made contact with Brett Moffitt on lap 75, causing debris to fall from his car and leaving damage hanging from its rear.

The following week at Talladega, Elliott started at the rear of the field due to an unapproved tire change but rallied to finish third in the GEICO 500.

[62] At Sonoma, a track he considers "one of [his] worst," he delivered an impressive performance, earning a race-high 49 points with two top-five stage finishes and taking fourth place overall in the Toyota/Save Mart 350.

However, his race ended prematurely the following day in the "big one" on lap 54, when Ricky Stenhouse Jr. turned Brad Keselowski near the front of the pack, triggering a massive crash involving 25 other drivers and resulting in a 34th-place finish for Elliott.

[65] At the Go Bowling at The Glen, Elliott started third, won Stage 2 for the third consecutive week (following Loudon and Pocono), and led the final 33 laps to claim his first career Cup Series victory.

[68][69] Elliott qualified for the 2018 playoffs and earned his second career victory on October 7 at Dover, holding off Denny Hamlin in overtime.

Following a chaotic final lap at Talladega, Elliott claimed another victory later that month at Kansas, fending off a late charge from Kyle Busch.

[80] In the next Cup Series race, the Coca-Cola 600—one of the few Crown Jewels his father Bill never won—Elliott was leading late when a flat tire on teammate William Byron's car triggered a caution and overtime.

[82] However, his momentum faltered at Bristol, where he was poised for a second consecutive win until contact with Joey Logano with three laps remaining dropped him to 22nd.

[83] In July, Elliott won the NASCAR All-Star Race at Bristol, dominating the event by winning two of the first three stages and leading the final segment.

In the first race of the playoffs, the Cook Out Southern 500, Elliott's car featured a throwback paint scheme honoring his teammate, mentor, and friend Jimmie Johnson.

Starting second, he tied teammate William Byron for the most laps led and secured his fourth consecutive road course victory.

[90] Elliott started last in the Season Finale 500 after failing pre-race inspection twice but went on to lead a race-high 153 laps, securing both the race victory and the championship.

[91] Together with his father, the Elliotts became the third father-son duo to win Cup Series titles, following the Pettys (Lee and Richard) and the Jarretts (Ned and Dale).

[99] At the Xfinity 500, Elliott swept both stages, earning enough points to secure a spot in the NASCAR Cup Series Championship Race.

[100] Competing against teammate Kyle Larson and Joe Gibbs Racing drivers Denny Hamlin and Martin Truex Jr., Elliott finished fifth, the lowest among the Championship 4 contenders, and failed to defend his title.

[105] At Road America, Elliott led 36 of 62 laps but finished 2nd after being passed by Tyler Reddick, who claimed his first Cup Series win.

[112] However, he bounced back with an 11th-place finish at Kansas and a runner-up result to Chris Buescher at the Bristol Night Race, securing his spot in the Round of 12.

On July 1, Hendrick Motorsports announced the end of their partnership with Hooters, as the restaurant chain was unable to fulfill its sponsorship obligations for the No.

[124] Despite starting on the pole, the car faced multiple mechanical issues, leaving Elliott to complete a stint while the team was 22 laps behind the leader.

In the 2021 season finale at Nashville Fairgrounds Speedway, he started fourth and battled his father, Bill, throughout the second half of the race before passing him to secure the victory.

[126] In the 2022 season finale at Sharon Speedway, Elliott won his second heat race and went on to claim victory in the main event after a duel with Tony Stewart.