Thousand Oaks, Calif. ? No wonder they call this the silly season.

In a topsy-turvy day at the Target World Challenge, Padraig Harrington made four birdies from off the green on the final six holes for a 5-under 67 that gave him a one-stroke lead Friday over Tiger Woods, Davis Love III and Chris DiMarco.

Harrington, the defending champion,tapped in for par on the 18th hole and saw his name atop the leaderboard at 3-under 141.

Woods had an 8 on the par-5 second hole, in part because of a snap decision to drop in an unfavorable spot. He recovered with six birdies the rest of the day, the last coming from 15 feet on the final hole for a 1-under 71.

“That was probably one of the uglier rounds I possibly could have played,” Woods said. “I didn’t kill anybody. I didn’t kill myself. All in all, it was a good day.”

Love never lost the lead until he went long on the par-3 12th for a double bogey, and short into the water on the par-3 15th and had to make a 15-footer for bogey. He wound up with a 72.

“I had a chance to run away, so that’s a little disappointing,” Love said.