( CNN ) -- A stunning 10-under par round of 62 fired Bubba Watson to the top of the leaderboard at the halfway mark of the WGC-Cadillac Championships on Friday . The left-hander followed up his opening round of 70 with a string of birdies -- nine in all -- and an eagle with the only bogey coming six holes from home . The American leads by one from his playing partner Justin Rose who had a similarly happy time of it on the TPC Blue Monster course in Florida . The Englishman finished with flawless eight-under par round of 64 . Joint first-round leader Adam Scott finished the day strongly ( four birdies on the closing six holes ) to claim third place on 10-under . Jason Dufner who topped the leaderboard with the Australian after day one could only manage a even par 72 to slip down into a tie for tenth . Denmark 's Thomas Bjorn completed another faultless four-under par 68 to leave him in a tie for fourth with Keegan Bradley who posted a round of 67 . The American bagged five birdies on the opening nine but came back in level par . Germany 's Martin Kaymer shot a eight-under par 64 to move up into a tie for seventh with South Africa 's Charl Schwartzel ( 69 ) and America 's Charles Howell III ( 67 ) . Tiger Woods followed up his opening par 72 round with a five-under par 67 to tie for 16th , while new world No.1 Rory McIlroy also improved on his opening round ( 73 ) finishing strongly to post a three-under par 69 . The Northern Irishman is still well down the field currently tied for 28th and ten shots behind Watson . Luke Donald , who can return to the top of the world rankings if he wins this weekend , is well placed to make a move on Saturday . The Englishman is currently tied for 10th on six-under par after posting a polished second round 68 .
Ten - under par round of 62 gives Bubba Watson third after two rounds at WGC - Cadillac Championship . Australia 's Justin Rose one shot off lead after a eight - under par 69 . New world No.1 Rory McIlroy fires three - under par 69 to finish day tied for 17th . Tiger Woods in the hunt after second round 67 leaves him tied for 27th .