Lefty hit from the rough to a greenside bunker at No. 3, setting up a 12-foot par saver that led him to pump his fist. There were more bunkers, and more fist pumps after saving par with a 9-foot putt at the 252-yard No. 4 and a 12-footer at No. 5.
"It wasn't anywhere near as tough as it was (Thursday), but my score didn't reflect it," said Mickelson, who opened with a 65. "I probably didn't strike it quite as well as I did (Thursday), but I made up for it with some good putting."
Geoff Ogilvy, ranked No. 7 in the world, had a stretch of five straight birdies - from Nos. 17-3, all less than 12 feet - on way to his 64 after an opening 72.
"They weren't crazy putts," said Ogilvy, whose only bogey came on his 16th hole. "Just the kind of putts guys hole when they shot a 6 under."
Divots: Defending champion Rory Sabbatini (144) missed the cut. ... Gay was born in Fort Worth, but lived their only as a baby. ... There were five top-10 players in the field, the most at Colonial since 2004. Only Mickelson and Ogilvy made the cut. Going home were K.J. Choi (143); Jim Furyk (144), who didn't have a birdie Friday; and Steve Stricker (147), who had consecutive double bogeys. ... Two-time Colonial champion Corey Pavin (1985, 1996) was 6 under before he bogeyed No. 4, his 13th hole, after missing the green. Pavin tossed his club to the bag as soon as he chipped 9 feet past the pin. He ended with another bogey and a 69, after an opening 67.