Jason Day ‘obsessed’ with new swing, leads Wells Fargo

Jason Day of, Australia, hits off the 11th tee during the first round of the Wells Fargo Championship golf tournament, Thursday, at TPC Potomac at Avenel Farm golf club in Potomac, Md. (AP Photo/Nick Wass)

POTOMAC, Md. — Three years and 364 days since his last victory, Jason Day describes himself as “obsessed” with honing his new swing and improving his results, even if he never gets back to No. 1 in the world.