For 2011, Cobb continued racing her own No. 10 truck full-time in the Camping World Truck Series, and also drove the first 5 races in the Nationwide Series in the No. 79 for 2nd Chance Motorsports. On the truck side, Cobb became the highest finishing female in Truck Series history by finishing 6th at the 2011 NextEra Energy Resources 250. She would hold this record for nine years, when Natalie Decker broke the record with a fifth-place finish, also at the season-opening Daytona race, in 2020. Cobb later announced that she would run the full season with 2nd Chance Motorsports in their No. 79 Ford and run for Rookie of the Year. Cobb later gave her truck's owners points to Chase Mattioli and his team while she also started her own driver development program with Cody Cambensy planning to drive in the Truck Series in 2011. She later left 2nd Chance Motorsports after a dispute with owner Rick Russell over whether to start and park after losing their second car at Las Vegas, where she confirmed she is not a start and park driver. Rick Ware Racing later gave her a ride in the No. 41.