Leaderboard: -9 G Willis (US), C Couch (US) -8 S Garcia (Sp), W Simpson (US)-7 B De Jonge (SA), M Turnesa (US), J Rose (Eng), R Thatcher (US), G Woodland (US), P Casey (Eng) Selected others: -6 M Laird (Sco)-4 M Kaymer (Ger)
Spaniard Garcia climbed up the leaderboard after carding a 66
Sergio Garcia moved up to second place at the Transitions Championship in Innisbrook, Florida after carding a five-under-par second-round 66.
The Spaniard struck five birdies to sit eight under, one shot behind leaders Garrett Willis and Chris Couch.
American Webb Simpson is also on eight under after a second successive 67.
Justin Rose shot 65 to join fellow Englishman Paul Casey and several other players on seven under, while world number one Martin Kaymer is four under.
Rose, who this week is using a bladed putter with no lines on it, said: "I'm trying to be more instinctive. I feel like I'm threatening the hole from 20, 25 feet more than I have been all year."
Casey fired a seven-under-par 64 to grab a two-stroke lead at the end of the first round but could manage only a par 71 on Friday.
Garcia, playing in his first PGA Tour event in seven months, has yet to hit a bogey this week.
Using his latest putting style, a claw grip, he birdied three of the first four holes, despite being stung by a bee.
"I hit the ball nicely. I hit a lot of fairways, I hit a lot of greens and have been chipping and putting nicely," he said. "So everything seems to be on the right way."
Couch, one of three men to card a round of seven under, suffers from tendonitis in his left elbow and has battled back from a shoulder injury.
"I feel like I'm good enough to win, and I've been playing well enough this year and last year to win," said the 37-year-old.
"You know, it's just hard to come back from an injury. It would definitely mean a lot to me. I've been blessed to be back out here. There was times when my shoulder was so bad that I thought that was going to be my career."
Scotland's Martin Laird is one of eight men on six under after he added a 70 to his opening 66.