I have tried and failed to consider all 156 golfers in the field this week at the PGA Championship. I've gone deep on Tony Finau, riffed on Brooks Koepka's chances to win two in a year and even picked Jon Rahm. But no matter what research I do or which players I coax myself into choosing, I keep coming back to the only two that matter this week: Rory McIlroy and Jordan Spieth.
I followed McIlroy and Spieth for the first two rounds of the 2015 PGA Championship at Whistling Straits. At the time, they held three of the four major championship trophies.