Spencer Moritz Gallagher 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 the son 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.

BK Racing is a former American professional stock car racing team that fielded entries in the Monster Energy NASCAR Cup Series from 2012 to 2018. It most recently fielded the No. 23 Toyota Camry and Ford Fusion for J. J. Yeley, Gray Gaulding, and other drivers. In 2018, the team was involved in a court case involving team owner Ron Devine and Union Bank & Trust Company over outstanding loans. In August of that year, after being turned over to a trustee who oversaw the team's operations, BK Racing was liquidated, with the assets going to Front Row Motorsports. However, BK Racing still fielded a car until the end of the 2018 season, with help from Front Row Motorsports and NY Racing Team.