Spencer Moritz Gallagher (born November 20, 1989) is an American former professional stock car racing driver.

According to Gallagher, he and fellow driver Dylan Kwasniewski lived in the same neighborhood growing up, though their first encounter was on the racetrack.

Gallagher spent time working for a Silicon Valley software company at age 19 while transitioning to a full-time racing career.

[5] Gallagher also attempted five races, failing to qualify for two, in the Camping World Truck Series, with a best finish of 20th at Texas.

Townley and Gallagher, both competitors in the ARCA series as well, felt there was mutual bad blood built up between each other.

[9] Gallagher started the season with a low note crashing early at Daytona and recovered for a 21st-place finish.

On June 25, 2016 at Gateway Motorsports Park, Gallagher was involved in a crash with John Wes Townley on lap 155 which led to an awkward fight between the two drivers for several seconds before NASCAR officials separated them.

[13] In April, Gallagher scored his first career Xfinity win at Talladega; he passed leader Tyler Reddick on the final lap in overtime to record the victory.

In August, Gallagher joined BK Racing for his Monster Energy NASCAR Cup Series debut at Watkins Glen International.

[18] Gallagher was originally supposed to replace Dalton Sargeant at Mosport due to his release, but aggravated his shoulder in a workout session a few days prior and Timothy Peters drove the No.

On October 19, 2018 it was announced that Gallagher will be stepping away from NASCAR competition to be focusing on managing his father's racing organization in efforts to bring exploring new opportunities off the track.

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