Oakmont, Pa. Purse: $21.5 million. Yardage: 7,372; Par: 70. All Times EDT.

Today's forecast calls for about a 50% chance rain throughout the morning, according to AccuWeather, with a slight break about the time the final pairings are scheduled to tee off in the afternoon. But that gives way to a 60% chance of rain starting about 5 p.m. through close to sunset.

McIlroy, who ended his major drought by beating Englishman Rose in a play-off to complete the career Grand Slam at Augusta National in April, won his solitary US Open in 2011. Rose claimed his only major title at the 2013 US Open.

Oakmont, Pa. 6:45 a.m.-12:30 p.m. — a-Matt Vogt, United States; Kevin Velo, United States; Trent Phillips, United States. 6:56 a.m.-12:41 p.m. — Chandler Blanchet, United States; Alvaro Ortiz, Mexico; Doug Ghim, United States.

The third round of the U.S. Open on June 14 at the Oakmont Country Club will begin at 9:12 a.m. when Philip Barbaree tees off as a single player, due to an odd number making the 7-over cut. The last twosome of leader Sam Burns (3-under) and J.J. Spaun (2-under) will tee off at 3:35 p.m.