Tifft, 22, proposed to girlfriend Jordan Holt.
Tifft just completed his second full-time season in the Xfinity Series as a driver for Richard Childress Racing.
Briscoe, 23, got engaged to Marissa Cooper.
Briscoe ran part-time this season, competing for Roush Fenway Racing and Stewart-Haas Racing with Biagi-DenBeste. He won the inaugural race on the Charlotte Roval for SHR and the Camping World Truck Series race at Eldora Speedway.