Moffitt won last weekend at Bristol Motor Speedway, and the back-to-back victories give him four for the season and 11 for his career.
Moffitt led all 20 laps of the first stage from the pole position to a 16.881-second gap over Ross Chastain in second.
Rhodes led the first nine laps of the second stage until a caution on Lap 29 after Dan Corcoran ran into a wall. Chastain took control following the caution and held on to win the stage on Lap 40. Chastain finished the race in eighth.
The Truck Series will resume on Sept. 13 at Las Vegas Motor Speedway for the World of Westgate 200, the last race in the playoffs’ round of eight. Two drivers will then be eliminated.
Moffitt is the only driver locked into the round of six.