South Africa's Louis Oosthuizen stormed into a three-shot lead at the $2.5 million Qatar Masters with a sensational second round performance at the Doha Golf Club on Friday. Former world junior champion Oosthuizen, who was in joint second place with four others at the end of the first round, shot a seven under par-65 to stamp his authority in Doha a week after finishing runner-up in neighboring Abu Dhabi. Oosthuizen had a bogey-free round, shooting birdies on the fourth, eighth, ninth, 10th, 12th, 15th and 16th holes as he carded the best round of the tournament so far to set himself up nicely with an aggregate of 12 under par 132. Oosthuizen leads Scotland's Andrew Coltart, who is in second spot, with 135, while Spaniard Alvaro Quiros and Australian Brett Rumford are in joint third with 136. Miguel Angel Jimenez shot a 71 to be on 137 Earlier, Coltart continued his resurgence after several years of struggle by shooting a 69. The Scot, among the early starters, was lucky to finish his second round as steady rain began falling late morning threatening to disrupt play at some stage. England's Paul Broadhurst, the Netherlands' Maarten Lafeber, Ireland's Damien McGrane, Thailand's Nirat Chapchai, Australia's Rodney Pampling and Sweden's Henrik Stenson are in a bunch of six with 138. Abu Dhabi winner Paul Casey missed the cut after scores of 76 and 69, joining such high profile names as Colin Montgomerie, Boo Weekley, Darren Clarke and Justin Rose. Perez stretches lead In California, American Pat Perez made the most of ideal scoring conditions to double his overnight lead to two shots in record-breaking style at the Bob Hope Classic early in Thursday's second round. Having opened with a scintillating 11-under-par 61 on the Palmer Private course at PGA West, Perez followed up with a flawless nine-under 63 on the Jack Nicklaus Private layout. The 31-year-old piled up nine birdies on another calm day in the California desert to set a PGA Tour record with a 20-under total of 124. Fellow American Briny Baird, helped by a hole-in-one at the par-three seventh on the Nicklaus course, carded a 63 to lie second. American Tom Lehman held the previous Tour record of 19-under 125 after 36 holes, at the 2001 Las Vegas Classic. Swede Richard S. Johnson fired a seven-under 65 on the Palmer Private course to get to 16 under, level with Americans Tom Pernice junior (63) and Jason Dufner (65). World number 16 Steve Stricker was eight strokes off the pace after returning a 67 at the SilverRock Resort, one of four venues hosting the five-round pro
