Xander Schauffele has withdrawn from the Sentry Tournament of Champions, two days after withdrawing from the Pro-Am.
The seven-time PGA Tour winner was 1 over through eight holes in Round 2 before pulling out of the event in which he won four years ago.
Following an opening 3-under 70, the 29-year-old revealed he has been dealing with an ailing back since last month's Hero World Challenge, but was hopeful he could finish all four rounds at Kapalua.
"It's just a bummer," Schauffele said afterward. "It's one of my favorite places to play, so hopefully that kicks into gear here in the next couple of days.