Watching the finish of the 3rd round tonight (2015 U.S. Open), there are 4 guys tied at for 1st at -4. I know that normal order of precedence is the order in which the golfers finished their round. Obviously Jason Day finished well ahead of the others, so I understand that he would be in the final pairing. Dustin Johnson and Branden Grace were in the same group (and both finished at -4), but Johnson tapped in before Grace, so I presumed Johnson would be in the final pairing (I believe Johnson actually is in the final pairing but continue reading...). However I did some research and read that if two players finish with the same score and played in the same group, the order reverts back to the player who had a better score to start the day (see Tiger Woods/Sergio Garcia 2013 Players I believe). In this case though, both Dustin and Branden started the day with the same score. So I have a question?
1) Would the next tie breaker in ordering revert back to who finished first in round 2,or would it be the player that had a better score going in to round 2?