Why was Rory McIlroy's driver non-conforming, what is the process for testing on tour and what does it all mean? Let's ...

Rory McIlroy used an alternative driver after his was deemed non-conforming ahead of the PGA Championship at the Quail Hollow ...

Rory McIlroy's PGA Championship driver switch has put driver testing under a microscope this week. Here's what you need to ...