Too close to call between Koepka and DJ.
Both are half way there, and both have clearly demonstrated with past results that they have the games to win the remaining two.
I said prior to The Masters that Rory struggles to put four rounds together, and was rather criticised for suggesting it. Lo and behold, he once again only played 54 holes like a Major champion. I was really interested to hear how his first rounds in Majors stack up against rounds two to four - he seems to play himself out of contention by Thursday evening far too often, and needs to find a way past it. I just can’t see him doing that at Augusta.
As for Spieth and Mickelson? No chance. Sorry.
I get what your saying about Rory with recent first rounds, but it is an interesting one where many will agree that Brooks and DJ have demonstrated they have the game to win their remaining two. Yet Brooks has 2 top 10s at the Masters whereas Rory has been top 10 in 6 of the last 7, so surely he's better demonstrated that he's closer to wining his final major for the slam than Brooks is to getting the Masters let alone an Open.
Is it how they carry themselves, the fact that mediocre rounds for Brooks are better than a bad round and three good for Rory, or is it just the period of time since the last Major that makes that logic work as many will definitely agree. On the last point, DJ has won after 4 years so not that different to Rory's 6 year wait so interesting where the cut off point feels like the pressure is to great due to the delay between wins.
I think if this years Masters had been back in April, Rory would have had similar form to DJ now and a great chance of winning. Hoping that's not his best chance gone. Personally don't think so but I can see why people give him less chance with the amount of bad first rounds recently in Majors. Joys of them all being such good players that you can make a case or not for each of them.