Earlier this weekend, Graeme McDowell and Phil Mickelson were the main stories at the 2010 U.S. Open, but Dustin Johnson and Tiger Woods took only one day to change the narrative.

Johnson mastered Pebble Beach in Round 3. After playing solid golf in the first and second rounds, Johnson sunk an eagle on the fourth hole and finished the round at 5-under. Johnson now has sole possession of first place by a three-stroke margin. He's never won a major, but has three PGA Tour wins to his name.

Tiger Woods, meanwhile, is playing some of his best golf of 2010. Woods also shot 5-under in Round 3, giving him sole possession of third place. He's five strokes behind the lead, so in order to win the U.S. Open, Woods will need to replicate his Round 3 performance and hope for some help from Johnson and Graeme McDowell, who sits in second place.

Entering Round 4, here is how the top of the leaderboard looks:

1. Dustin Johnson (6-under for tournament)
2. Graeme McDowell (3-under)
3. Tiger Woods (1-under)
T4. Ernie Els (E)
T4. Gregory Havret
6. Phil Mickelson (+1)
T7. Ryo Ishikawa (+3)
T7. Alex Cejka
T7. Tim Clark

Ryan Ballengee is live on the scene at Pebble Beach. Check out his news, updates, and analysis over at SB Nation's golf blog, Waggle Room.