Spencer Moritz Gallagher (born November 20, 1989) is an American professional stock car racing driver. He last competed part-time in the NASCAR Monster Energy Cup Series, driving the No. 23 Toyota Camry for BK Racing, part-time in the NASCAR Xfinity Series, driving the No. 23 Chevrolet Camaro, and part-time the NASCAR Camping World Truck Series, driving the No. 2 Chevrolet Silverado for GMS Racing. He is also the third of four sons of Allegiant Air's CEO, Maurice J. Gallagher Jr. In 2018, Gallagher announced that he would step away from full-time racing at the end of the 2018 season to take on a managerial role at GMS Racing. Early career Gallagher was born in Las Vegas, Nevada. According to Gallagher, he and fellow driver Dylan Kwasniewski lived in the same neighborhood growing up, though their first encounter was on the racetrack. He is the son of Allegiant Air CEO Maury Gallagher. Gallagher spent time working for a Silicon Valley software company at age 19 while transitioning to a full-time racing career. Gallagher began racing at age 12 in the Bandolero Bandit Series, then progressing to the Legends Car Series at the Las Vegas Motor Speedway Bullring. Gallagher began to take his racing prospects seriously in 2009 on the recommendation of car owner and former driver T.J. Clark. He won the Silver State Road Racing Championship that year, and the INEX Legends Road Course World Finals in 2010. He also ran 6 races in the Super Late Model Series with a best finish of fourth. In 2011, Gallagher made 6 starts in the NASCAR K&N Pro Series West, then made two in the East Series in both 2011 and 2012. Developmental series 2011–2013 Gallagher made his debut in the ARCA Racing Series at Indianapolis Raceway Park in 2011, and ran two more races with a best finish of 15th in the No. 05 Allegiant Air Chevrolet. He ran the full 19-race schedule in 2012, earning six top 10s and finishing 7th in points. His results improved in 2013, with 12 laps led, five top-five finishes and eight top-ten finishes. He failed to qualify for two races, however, and missed a race after a concussion at Michigan, relegating him to a 10th-place points finish. Gallagher also attempted five races, failing to qualify for two, in the Camping World Truck Series, with a best finish of 20th at Texas. 2014 Gallagher ran the