(CNN) -- Scott McCarron holds a two-stroke lead after the second round of the Northern Trust Open after carding a three-under-par 68 to follow his opening 64 at Riviera.
McCarron holds a two-stroke lead as he attempts to atone for failing to win the 2002 Riviera tournament.
The 43-year-old McCarron, who led by three strokes with five to play before eventually finishing second in the 2002 tournament, lies on 10-under-par 132 -- two strokes ahead of fellow-Americans Tommy Armour (67) and Steve Stricker (66).
South Korea's KJ Choi, Australian Geoff Ogilvy, Rory Sabbatini of South Africa, England's Luke Donald and American Phil Mickelson are among a group of players tied on fourth place, three shots adrift of McCarron.
First round leader Mickelson fell back slightly but remained in the hunt as he seeks his first victory of 2009. He finished with a one-over-par 72 after a bogey-free round on Thursday.
Veteran Armour, who turns 50 in October, posted his second solid round in as many days after shooting back-to-back 67s.
Japanese teen sensation Ryo Ishikawa failed to make the cut in his PGA Tour debut, shooting an even-par 71 on Friday. The 17-year-old finished with two birdies and two bogeys in the second round to miss the cut by three strokes.
Other big players to miss the cut included double Major winner Padraig Harrington, Vijay Singh and Australian Steve Elkington.