William Byron knew when he took over the No. 24 Chevrolet for Hendrick Motorsports that Martinsville Speedway was more than a little bit special. If he had any doubts, a field trip with car owner Jeff Gordon made it clear. “When I was a rookie, Jeff was like, ‘Hey, let’s ride up to Martinsville together.’ It wasn’t even a question, it was, ‘Hey, let’s ride up to Martinsville together. I want to show you some things,’” Byron said after becoming the first multiple winner of the season in NASCAR’s Cup Series at the track on Saturday night. Gordon showed Byron around the 0.526-mile oval, shared some pointers and saw the trip pay off when Byron ran second in a race there to Martin Truex Jr. Byron had three more top-10 runs in four subsequent visits, then put it all together on a cold night when the temperature made tire wear a non-factor. He also showed some chops as a front-runner, hanging onto the lead in a two-lap dash to the finish with Joey Logano trying to nudge him out of the way. The victory in a race he led for 212 laps added a second grandfather clock trophy to his haul; he won the first in the Truck Series two nights earlier.