Returning to the tournament where he's had a decade worth of success and become a de facto ambassador, Zach Johnson was asked what aspect of his game he's been working on in advance of this week's John Deere Classic.
"I wouldn't even know where to start on that one," Johnson told reporters Tuesday.
It's been a lean year for the two-time major champ. Johnson tied for seventh at the RSM Classic in November, but that remains his most recent top-10 finish on Tour. He's missed four of 14 cuts since the calendar flipped to 2019, with a T-16 result at the RBC Heritage in April the only time he cracked the top 20.