Two rounds of golf are in the books at the 2012 PGA Championship, with Tiger Woods, Vijay Singh and Carl Pettersson all tied atop the leaderboard at 4-under par for the tournament.
Singh played extremely well on a difficult day for many of the competitors, shooting a 3-under round of 69 that included five birdies. Woods shot 1-under on Friday, carding three birdies, while Pettersson had a rough day that included a sequence of five bogies in seven holes on his was to a 2-over round of 74. Woods is looking to win his first major championship since 2008.
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