Rob Gronkowski and WWE star Mojo Rawley are set to serve as the grand marshals for the NASCAR virtual racing event on Sunday. Gronkowski is also scheduled to host WrestleMania. WrestleMania is set for Saturday and Sunday. Rawley and Gronkowski are long-time friends and the two will start Sunday's iRacing event on the virtual Bristol Motor Speedway track. Gronkowski has served as a Fox Sports analyst since he retired from the New England Patriots.