Justin Thomas, after a period of relative quiet, is back in the spotlight as a favorite at the PGA Championship. Improved putting and iron play have been key to Thomas's recent resurgence, including a win at the RBC Heritage. Thomas acknowledges the motivating factor of seeing peers like Scottie Scheffler and Rory McIlroy achieve major successes.

Scottie Scheffler's search for a major outside Augusta National and Jordan Spieth's possible career grand slam are other topics to watch

Rory McIlroy has won at the venue for this year's PGA Championship four times in his career, and the two stars have given their thoughts on what sets him apart