level of play was unrivaled throughout the week, and his dominance of play is evidenced by his 8-stroke margin of victory over 2nd-place finisher Jason Day. McIlroy set several records in his victory, most notably, his 72-hole aggregate score of 268 (16-under) was a new U.S. Open record. The 268 aggregate beat the previous record of 272 held by Jack Nicklaus (Baltusrol, 1980), Lee Janzen (Baltusrol, 1993), Tiger Woods (Pebble Beach, 2000), and Jim Furyk (Olympia Fields, 2003). The 16-under in relation to par beat Tiger Woods' 12 under at Pebble Beach Golf Links in 2000. He became the youngest winner since Bobby Jones in 1923. The victory lifted McIlroy's position in the Official World Golf Ranking to a then career high of number four. On 17 June, during the second round of the US Open, McIlroy would become the first player in the history of the championship to reach a score of 13-under-par at any point in the tournament. He achieved the feat by making birdie at the 17th hole in the second round. Despite a double bogey on the final hole, his two-day total of 131 (65-66, 11-under-par) set a championship scoring record as the lowest 36-hole total in U.S. Open history. The score was one better than Ricky Barnes' 132 in 2009. He was also the fastest golfer to reach double digits under par in the U.S. Open, reaching 10 under par in 26 holes. On 18 June, during the championship's third round, he became the first player to reach 14-under par at the tournament by making a birdie at the 15th hole, and would finish the round off to capture the 54-hole U.S. Open scoring record, posting a 3-round total of 199 (-14). In doing so, he also built an eight-stroke lead going into the final round. A final round of 69 allowed him to claim his first major championship setting the 72-hole record. Rest of 2011 McIlroy took a month off from competitive golf. At The Open Championship he struggled in tough weather over a difficult layout at Royal St George's Golf Club, failing to contend with the conditions. He was again a non-factor at the PGA Championship at Atlanta Athletic Club after injuring his wrist on the 3rd hole of the first round after attempting to play a stroke from behind a tree root. McIlroy went on to win the Lake Malaren Shanghai Masters