South Korea's Charlie Wi took over at the top for a time with five birdies in his first 11 holes.

BBC: Goosen ends PGA Tour win drought

South Korea's Charlie Wi, Fijian Vijay Singh, and Americans Bill Lunde and Corey Pavin are a further shot back on nine under after two rounds.

BBC: Justin Rose surges to four-shot lead at Travelers

Both men are five shots behind Mickelson on 12-under par, with Argentina's Angel Cabrera, Charlie Wi from Korea and American Brian Gay all one shot further back on 11-under.

CNN: STORY HIGHLIGHTS