Early years Finchum began racing at the age of seven, starting his career racing
go-karts at Dumplin Valley Raceway in Tennessee. By the age of thirteen he had logged 200 go-kart wins on dirt and asphalt. and also competed in
Bandolero and
Legends cars in
Charlotte Motor Speedway's Summer Shootout. He would win the
Tennessee NASCAR Whelen All-American Series championship in 2010.
NASCAR Finchum drove his first four
K&N Pro Series East races in 2011 with Lori Williams, who had given
Daniel Suárez and
Jesus Hernandez rides previously. Finchum scored two top-ten finishes that first year, finishing seventh at
Bowman Gray Stadium and
Gresham Motorsports Park. He joined
Spraker Racing in 2012, finishing seventh again at
Bristol Motor Speedway but not finding success in his other three starts. One start with Spraker in 2013 yielded a DNF at Bristol. Finchum then started 2015 driving for his own team but then associated with Martin-McClure Racing later in the year. In only his third start with the team, and his first in 2016, Finchum won the K&N race at Bristol. Starting from the fourth position, Finchum passed polesitter and leader
Harrison Burton thirteen laps into the race and never looked back. In a late restart Finchum held off future NASCAR national series drivers
Kyle Benjamin,
Justin Haley,
Kaz Grala and
Todd Gilliland. Focusing on the
Xfinity Series in 2017, Finchum ran one K&N race, recording a fifth at Bristol. Finchum, in conjunction with his
K&N Pro Series East team Team McClure Inc., signed on for two races with
MBM Motorsports including a debut race at
Dover International Speedway. Despite falling out with engine problems at Dover, Finchum was approved for 1.5-mile tracks, yielding another start at
Kentucky Speedway. Finchum made five more starts in 2017 ranging from 1-mile Dover to 2.5-mile
Indianapolis Motor Speedway, cracking the top thirty three times. In late November 2017, Finchum was announced as the full-time driver of MBM's No. 40 entry for the
2018 NASCAR Xfinity Series season. He led second practice at
Daytona International Speedway in July. He finished the year 30th in final point standings. On March 27, 2018, Finchum announced in a
Bristol Motor Speedway promotional video that he would make his
Monster Energy NASCAR Cup Series debut at that track in April 2018. The run came in the No. 66 car for
MBM Motorsports, whom he also drives for in the
NASCAR Xfinity Series. Bristol was a track that Finchum was especially excited to make his debut at, as he considers it a "home track". After starting 38th, he finished 33rd when he retired from the race on lap 335. In 2019, Finchum surprisingly qualified second for both the
Rinnai 250 and the
Boyd Gaming 300 after rain canceled qualifying and the field was set by owner points from the 2018 season (due to those races only being the second and third of the new season), which MBM had bought from
Chip Ganassi Racing's former Xfinity Series team. They also switched to Ganassi's old number, the No. 42, that year. That season he ran nearly full-time, only missing Daytona, which was run by
John Jackson. Finchum failed to qualify for the
2020 Daytona 500 after finishing twentieth in Duel 1 of the
2020 Bluegreen Vacations Duels. In September, he ran the
South Point 400 at
Las Vegas Motor Speedway, finishing last when overheating ended his day after nineteen laps. He also competed at
Kansas and
Texas, where he respectively finished 39th and 35th. but was replaced by
Garrett Smithley. He made a start with the team at
Nashville Superspeedway with the No. 66, where he finished in 33rd. On August 28, 2023, it was revealed through the entry list for
the race at
Darlington in September that Finchum would drive the No. 08 car for
SS-Green Light Racing in that race, marking the first time he would drive for a team other than
MBM Motorsports in the Xfinity Series and in NASCAR's top three series. Finchum returned to MBM to drive their No. 66 car part-time in the Xfinity Series in 2024. He also made a start for
Joey Gase Motorsports in the throwback weekend race at Darlington in May, running the paint scheme from
Kevin Harvick's first Cup Series win in
2001 at Atlanta, the same one Harvick himself ran the previous year in the
North Wilkesboro All-Star Race with his old No. 29. On December 21, 2024, it was announced on a
Facebook post from MBM that Finchum would drive for the team in 2025, beginning at
Texas. On April 26, 2026, Finchum led laps in the NASCAR Cup series for the first time in his career at
Talladega, leading 8 laps after surging to the front from 38th. ==Personal life==