Hanson struggling on Olympic's front nine
The 34-year-old Swede double-bogeyed the first hole. Then he had four straight bogeys. The only player having a worst time on the course in the morning is the 14-year-old Andy Zhang, who had six over-par scores before a par at the 6th and a birdie at the 7th.
Hanson had a top-five finish at the WGC-Cadillac Championship this year and he reached the quarterfinals at the Accenture Match Play.
Farrell Evans covers golf for ESPN and can be contacted at firstname.lastname@example.org.