Phil Mickelson compiled a brilliant 66 to snatch the lead at the World Golf Championships-Bridgestone Invitational.
Mickelson’s four under par effort saw him replace overnight leader Retief Goosen at the top of the leaderboard on six under for the tournament.
Starting at the tenth, Mickelson birdied the par four opener and he birdied the 14th as the American’s second round got off to a good start.
He then picked up a shot at the par five second and made it back-to-back birdies with a three at the third.
A birdie two at the seventh was cancelled out by a bogey at eight to ensure Mickelson followed up yesterday’s 68 with a 66.
Lee Westwood leads the European challenge after a stunning 65 - the lowest score of the week so far at at Firestone Country Club, Ohio.
Westwood started on the tenth tee and biordied his first two holes as he set about improving on his opening 70.
The Englishman was still two under at the turn but then birdied the first and second and despite a bogey at three he picked up shots at the fourth and sixth as The European Tour member climbed the leaderboard.
Sean O’Hair compiled a 67 to move to five under for the tournament along with Westwood - one shot behind Mickelson.
The American dropped a shot at the fifth but responded with a birdie two holes later at the par three seventh.
On the back nine O’Hair picked up shots at the tenth, 14th and 18th to remain firmly in contention.
Australia’s Peter Lonard had an up and down first four holes but a strong finish left him in the frame on five under for the tournament after a second round 66.
Lonard birdied the first, dropped a shot at the par five second and then picked up a stroke at the third - only to drop back immediately with a bogey at four. But birdies at seven and eight set him on his way and three birdies in the last four holes saw him join O’Hair, Zach Johnson and Westwood..
Johnson started on the tenth and opened with a bogey but cancelled that out right away with a three at the par four 11th.
Another dropped shot at 13 set the 2007 US Masters Champion back but he birdied 17, only to bogey the 18th.
But on the front nine Johnson registered birdies at the second, third and fifth without dropping a shot to go into the weekend with real hopes of success.
Miguel Angel Jimenez is one shot further back amongst a group of eight players on four under after a 66 - which would have been even better but for a double bogey at the 18th.
On the course, European Tour Members Retief Goosen and Daniel Chopra are four under for the tournament after six and five holes respectively.
Overnight leader Goosen has parred all six holes in his round so far.