Bill Haas and Justin Rose will take a share of the lead into the third round of the Arnold Palmer Invitational.
                                
Tied at the top: Bill Haas 
 
 
Haas  produced an impressive round of 66 to join first round  leader Rose at  the top of the leaderboard after the Englishman dropped  two shots en  route to a second round 70. 
Tiger Woods, who can regain the world number one ranking should  he  successfully defend his title at Bay Hills this week, seemed destined   for the top of the leaderboard halfway through his second round, but   had to card a 70 after three consecutive bogeys on the last three holes.  
Four time major winner Phil Mickelson and Brandt Snedeker are the  two  notable absentees going in the third round after both players  missed  the cut. Mickelson produced and error-laden round of 79, which  included  two triple bogeys, while Snedeker closed out his second round  with a  double and triple bogey. 
Rose started his second round well and picked up four strokes  early on  to shoot up the standings, but bogeys on the 14th and 18th set  him back  somewhat. Haas produced a flawless round, which included four  birdies  and was capped by a glorious eagle at the 16th. 
In second place, one stroke behind the leaders on eight under par  is  John Huh, who fired a 69 which featured only one bogey and birdies  on  the fifth, seventh, 17th and 18th. 
Woods started the round in good form with a birdie on the first  and an  eagle on the sixth, followed by two more birdies at the 11th and  13th,  before being pegged back. 
The world number two finished on five under, one stroke behind  Ken  Duke, Jimmy Walker and JJ Henry in a three-way tie for fourth. 
Mickelson has been in inconsistent form of late, winning at Phoenix before missing the cut at Bay Hills.  
The three-time Masters winner admitted after the round that he  needs to  work on his game with the event at Augusta National only three  weeks  away. 
"Obviously, I played terrible, and I deserved to shoot a score like this," the southpaw said after his round. 
"I'm glad I played because had I showed up in Houston and had  this  happen I wouldn't have had an opportunity to get in the  competition.  I'll go work with Butch and see if I can get dialed in for  Houston."
 
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