And this is interesting, because it's the first time it's happened in his pro career.

It's wrong to call this a problem. He's still gaining a ton of SG: Off The Tee (3rd on tour) while still hitting loads fairways (62%) with more distance than he had last year (311 yards vs. 308 yards). Yet his approach play is far off from the incredibly high standards he has set the past few seasons—he's 40th this season, the lowest its been since his first full season on tour.

I can't help but wonder if the two things are related, and we just don't have a great way to measure it yet.