Moffitt, the 2015 Sprint Cup Rookie of the Year, will drive the No. 11 at Bristol Motor Speedway (Aug. 17), Michigan International Speedway (Aug. 27) and Canadian Tire Motorsports Park (Sept. 4).
Tifft is out indefinitely, recovering from brain surgery to remove a low-grade tumor.
Moffitt drove the No. 11 at Kentucky Speedway and at Pocono Raceway. The Iowa native started second at Kentucky but fell victim to engine failure. At Pocono, Moffitt took the No. 11 from 15th to third for his best finish in four career Truck starts.
“Brett has done a great job in the No. 11 so far and we’re glad to welcome him back to the team for the next three races,” said team owner Tom DeLoach in a press release. “Hopefully we can continue to ride the momentum that (crew chief) Scott Zipadelli and the team have built and get to Victory Lane.”
After his Rookie of the Year honors last year, the two Truck starts are Moffitt’s only NASCAR starts this season.