ORLANDO — Charlie Wi felt a lot better walking off the course compared with his last round.
So did Tiger Woods.
Wi, who made 13 on one hole during Sunday's final round of the Transitions Championship in Palm Harbor, shot 6-under 66 to share the first-round lead with Jason Dufner in the Arnold Palmer Invitational at Bay Hill on Thursday.
Woods, who on March 11 withdrew during the final round at Doral with a sore and swollen left Achilles' tendon, shot 69.
Wi has had an eventful year. He blew a three-shot lead during the final round at Pebble Beach on Feb. 12. Last week's 13 on the par-5 fifth at Innisbrook came after he failed three times to hit a shot through a gap in the trees. He shot 78 and finished last among those who made the cut.
At Bay Hill, he has withdrawn once, missed the cut twice and tied for 24th last year. But he birdied two of his final three holes Thursday. At 18, he hit an 8-iron over the water to 6 feet for birdie.
"If I had known I'd be a couple under before I teed off, I would have been very pleased," Wi said. "To shoot 66 is a pleasant surprise."
Woods had only two approach shots inside 15 feet on the par 3s and par 4s but putted well.
"I didn't really do anything great," he said. "I was just solid all day. I drove the ball well, hit my irons decent and putted all right.
"(The Achilles' is) feeling good. I've been getting treatment. Everything's good. No swelling. If I can just keep it that way, everything will be great."
Dufner had just one bogey and eagled the par-5 16th.
Anthony Kim hit a hole-in-one on the par-3 203-yard 17th with a 5-iron.
LPGA: Yani Tseng and Ji Young Oh shot 5-under 67 to share the first-round lead at the Kia Classic in Carlsbad, Calif. Tseng, who won the LPGA Founders Cup on Sunday, finished with a birdie on the par-4 ninth after a bogey on the par-3 eighth. Oh, who has dealt with a hip injury over the past two seasons, also had six birdies and a bogey. Seminole's Brittany Lincicome was among four one shot back. Tampa's Cindy LaCrosse shot 1-over 73 and Tampa resident Kristy McPherson 7-over 79.