AUGUSTA, Georgia, April 10 : Wyndham Clark carded a polished second-round 68 at the Masters on Friday to sit one shot behind overnight co-leaders Rory McIlroy and Sam Burns, and Scottie Scheffler struggled on the front nine as veteran Justin Rose gained momentum around the turn. Clark drilled home three consecutive early birdies before a bogey on the challenging par-4 10th appeared to stall the American former U.S. Open champion's momentum. He got it back with birdies at the 15th and 16th holes,