Six-time PGA TOUR winner Jimmy Walker, who has one top-10 in his last 98 starts on TOUR, holds the 36-hole lead or the co-lead for the ninth time on the PGA TOUR. Walker has missed eight cuts in his past 12 events.
Jon Rahm with 69 and 12-under as Brooks Koepka faltered with 75 and ended at 8-under, just as the ageless Phil Mickelson did with his Masters best round of 65.
Koepka added one more birdie to his total to get to 13-under, even as his closest rival, Jon Rahm, slipped from 10-under to nine-under and the lead had swelled to four shots at the 87th Masters.
K.H. Lee brilliantly carded the joint low score of the day with a 5-under 67 on Friday to make the weekend rounds of the weather-hit Masters Tournament and was joined by countrymen Tom Kim and Si Woo Kim.
Sam Burns found himself behind early on against Young but responded brilliantly, winning four holes in a row from the fifth to turn the match on its head at Austin Country Club.
Defending champion Scottie Scheffler maintained his phenomenal record at this event - where he has finished second and first in the last two editions - with a three-hole victory over Tom Kim. World Number Three McIlroy beat Keegan Bradley in a repeat of their 2012 Ryder Cup singles clash.
Kim, a four-time PGA Tour winner, swept to a 4 and 3 victory over World No. 9 Viktor Hovland in his Group 8 match at Austin Country Club and needs only a tie in his final group match to advance out of the group stage
World No. 1 Scottie Scheffler launched his title defence with a hard-fought 1-up win over Davis Riley while second-seed Jon Rahm fell to a 2 and 1 loss to a resurgent Rickie Fowler. Korea's Sungjae Im romped to a stylish 8 and 6 victory over American Maverick McNealy.
Scottie Scheffler closed with a 6-under 65 to beat Nick Taylor by two strokes on the Stadium Course. The 26-year-old Texan took the number one ranking from Rory McIlroy with his fifth PGA TOUR victory. Scheffler moved to fifth in the FedEx Cup standings.
Scottie Scheffler, the World No. 2, shot a 3-under 68 in front of some 200,000 fans at TPC Scottsdale to get to 13 under, two strokes ahead of third-ranked Jon Rahm and Nick Taylor.
Sungjae Im, chasing a third PGA Tour win, chipped in for birdie from 63 feet on the par-4 10th hole before making five more gains including a 34-footer at the famous par-3 16th at TPC Scottsdale's Stadium Course to sit on 6-under through 12 holes. Play was suspended due to darkness with the