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Talk of feuds and payback has dominated the NASCAR headlines of late. In other words, Sunday's Cup race at Martinsville is shaping up to be one heckuva show.

Jeff Burton didn't have to participate in this week's NASCAR test at Charlotte Motor Speedway. That he did showed us one thing: 2013 will be a critical year for RCR and the No. 31 Chevy.

Just how important is this week's NASCAR test at Charlotte Motor Speedway? David Newton offers five reasons some of the top drivers are in town -- and not at the beach.

Dr. Eric Warren has been hired as the new director of competition at Richard Childress Racing, multiple sources told ESPN.com on Tuesday.

How can you really know what's in the supplements you may take? Experts will tell you that unless you're extremely cautious, you won't.

NASCAR free agency wasn't supposed to get silly in 2012, what with all of the top Cup drivers expected to return to their teams in '13. Then Matt Kenseth dropped a bombshell.

Bristol Motor Speedway's attempt to bring back the bumping and banging fans have missed the past few years is a success if Tuesday's Goodyear tire test is an indication.

Reaction to Kurt Busch's one-race suspension for threatening comments made to a reporter following Saturday's Nationwide Series race at Dover has been mixed among fellow Sprint Cup drivers.

It can be hard to outrun your reputation. Just ask Kurt Busch, who is the fun-loving prankster one week and the devil with a helmet the next. But is that accurate?

The pressure on Kevin Harvick running a race team with wife DeLana may have been too big a burden. Finally free of it and with a baby on the way, Harvick may have found his winning formula.

NASCAR is looking at further changes in order to reduce the amount of two-car drafting in time for the 2012 Daytona 500, sources close to the situation said Thursday.

Jimmie Johnson experienced the kind of violent collision Saturday night that leaves us holding our breath. One day after watching Dan Wheldon lose his life, Johnson was back at work.

Will NASCAR finally put an end to all these off-track shenanigans and just get back to racing? Let's hope not.

Cool heads did not prevail when NASCAR elder statesmen Jeff Gordon and Jeff Burton got into a shoving match last fall at Texas.

Sure, the Jeff Gordon-Jeff Burton scuffle this past fall at Texas was highlight-worthy stuff. But the glorified shoving match didn't make David Newton's list of NASCAR's best beatdowns.

Sure, Carl Edwards could've punted Kyle Busch at Bristol and perhaps held on to win Sunday's Jeff Byrd 400. But the fallout could've been monumental.