A look at some of the things that stood out on day one of the 2019 Masters, where Brooks Koepka and Bryson DeChambeau share the lead on 6-under par.

1. Through 11 holes, Bryson DeChambeau was 1-under par. He finished his final seven holes with six birdies, including four-straight on Nos. 15-18.
2. Following the only bogey-free round of day, Brooks Koepka was in a familiar position at a major championship – atop the leaderboard. Still three rounds to go, but a win here would give him three of the last four majors and set him up for a potential grand slam at Royal Port Rush.
3. Last reigning PGA Champ to win the Masters was Phil Mickelson in 2006; last reigning U.S. Open champ to win was Tiger Woods (2001).
4. With five birdies and two pars on his final seven holes, Phil Mickelson went from even-par (T50) to solo third on 5-under par.
5. Four-time Masters winner Tiger Woods opened with a 70 to remain in the hunt, four off the pace of the co-leaders.
6. Despite claiming his game was in a good place, Jordan Spieth shot a 3-over 75, and will have to fight just to make the cut.
7. Entering the Masters, Paul Casey was a popular sleeper type pick, but the 41-year old Englishman played more like he was asleep, shooting a 9-over 81.
8. Betting favorite Rory McIlroy carded a first-round 1-over 73 and has work to do.