Key stats from Round 1 at St. Andrews

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Dustin Johnson leads by one stroke after the opening round of the 2015 Open Championship at St. Andrews. Here are some key stats provided by Golf Channel's editorial research unit.

Dustin Johnson: 7-under 65 ties lowest career round in any major

• Second straight major to open with 65 (U.S. Open, finished T-2)

• Third bogey-free round in major championship career

• Played first five holes of round in 4 under

• Finished runner-up at U.S. Open; leads after first round at St. Andrews

• Last to do that was Tiger Woods in 2005 (won Open Championship)

• Fifth straight opening round under par in a major

• Fifth straight round of par or better in Open Championship


Jordan Spieth: 5-under 67; opened Masters and U.S. Open with 64 and 68

• Combined 28 under par in major championships this year

• Has birdied 32.7 percent of holes in majors this year (53/162)

• Best first round score in Open by player to win Masters and U.S. that year

• Birdied five of first seven holes in round (even par rest of round)

• Combined 25 under over last four rounds of competition

• Eight of nine rounds this year in majors have been under par


Zach Johnson: 6-under 66; third time in four years to begin The Open with 66 or lower

• Fourth 66 or lower in last 13 Open Championship rounds played

• Ninth straight round of par or better overall in competition

• Three best opening rounds in majors have all come in Open Championship


Jason Day: 6-under 66; lowest career first round score in any major

• First career round in the 60s in The Open Championship

• Fourth straight major to open with round in the 60s

• Fifth career bogey-free round in a major (first in The Open)

• Five top-4 finishes in majors (0 wins); all since beginning of 2011


Phil Mickelson: 2-under 70; Sixth time to begin Open Championship with round under par

• Phil Mickelson: Last instance – 2013 (shot 69, went on to win)


Tiger Woods: 4-over 76; worst first round score of Open Championship career

• Worst score in an Open at St. Andrews as a professional

• Only birdie came on 14th hole

• Combined 21 over in last four rounds of major championship golf

• 27 bogeys or worse over last four rounds in majors (6.8 per round)

• Opening round scoring average of 73.88 this year (one round under par)