Kyle Busch has four NASCAR wins as the first half of the season speeds toward its conclusion.

On Sunday, Busch won for the third time in the NASCAR Cup Series with Richard Childress Racing. It was a dominating performance from the pole, the No. 8 Chevrolet not only faster in a straight line but also stronger through the corners at World Wide Technology Raceway. Outside of Cup, he also won in Las Vegas in early March when he made his first Craftsman Truck Series start of the season.

There are a lot of drivers who would gladly take four wins. But if it were up to Busch, that would only be the tip of the iceberg if he were still allowed to race as much as he wanted to.

“Yeah, (I) definitely miss being able to run as much as I want to a lot,” Busch said recently.

It’s been seven years since NASCAR instituted limitations on Cup Series drivers running in the other two national series. Those with more than five years of full-time experience were limited to 10 races in the Xfinity Series and seven races in the Craftsman Truck Series going into the 2017 season. They were also not permitted to run in the playoff races.

NASCAR said the guidelines were to “elevate the stature of future stars” while still competing against the sport’s best from the Cup Series. Some – like Busch – would argue it was ‘the Kyle Busch rule’ to limit the wins being taken away from series regulars.