2021 Memorial Tournament leaderboard: Collin Morikawa, Patrick Cantlay tied for lead after Jon Rahm withdrawal

Rahm took a commanding six-stroke lead in Round 3 before being informed of a positive COVID test as he left the course

A wild Memorial Tournament got a lot crazier on Saturday evening as tournament leader -- and heavy favorite -- Jon Rahm had to withdraw after testing positive for COVID-19. Rahm led by six strokes over Patrick Cantlay and Collin Morikawa, who are the new co-leaders at 12 under entering Sunday.

Rahm's day on Saturday was insane. He made an ace early on as he finished up his second round and then fired an outrageous 64 that could have gone down as one of the great rounds of the PGA Tour season. Now, though, he's no longer in the tournament as he immediately withdrew following a round in which he gained nine (!!) strokes on one of the best fields of the year.

Instead, Morikawa and Cantlay will duke it out on a course where they have both won professional events before. So let's take a look at what they have in front of them on what will be a crazy Sunday at Muirfield Village.

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T1. Collin Morikawa (-12): He shot the second-best round of the day on Saturday in Round 3, which slated to go down as simply unfortunate timing for getting hot if not for the Rahm WD. Now he has a real chance to win for the fifth time in his first 50 starts on the PGA Tour with the majority of them coming at big-time courses and events.

Morikawa is now first in the field from tee to green this week, which is not unusual for him. The difference is that he's gaining strokes with his putter, and has two 66s to show for it as a result. If he does that again on Sunday, he'll once again raise a trophy over another elite American player on the 18th green at Muirfield Village.

T1. Patrick Cantlay (-12): A birdie at his last hole on Saturday seemed pretty inconsequential until about five minutes later when his playing partner withdrew. Cantlay destroys at this course, but his week -- like Morikawa's -- was going to go down as poor timing against one of the greats in the game. Now he can take advantage of even worse timing for Rahm.

Cantlay's 68 was five strokes better than the field average, and he's in the top 10 in strokes gained in every category through three rounds, which is pretty wild but also sums up his game -- which has no holes in it -- very well. With most of the firepower toward the end of this tournament consolidated in this twosome, it should make for some terrific golf down the stretch.

T3. Branden Grace, Scottie Scheffler (-9): There are not really any winners after a bummer of a day like Saturday at Muirfield Village, but Scheffler and Grace are beneficiaries of now being involved in a tournament they were pretty much out of as recently as the end of Round 3. Scheffler is the bigger name and the better player right now, but he's still searching for his first PGA Tour win. A victory over Morikawa and Cantlay on a Sunday at the Memorial would qualify as a full arrival for him. Grace, incidentally, is one of the handful of players who have had to withdraw from a tournament in the middle of it. He did so at the Barracuda Championship last year where he was T2 after two rounds. 

Everyone else in the field is 6 under or worse, and Data Golf does not give any of them better than a 0.5% chance of winning.

[Jun 5, 2021 at 6:12 pm ET · Kyle Porter]

Jon Rahm has a putt on No. 18 for a 28 on the back nine. He's gained 9 strokes on the field today, which is "round of the year" territory. This putt is to gain 10 strokes. Ten!

[Jun 5, 2021 at 5:15 pm ET · Kyle Porter]

Scottie Scheffler gets it to 10 under to join the other three in double digits under par. Crazy that he has yet to win on the PGA Tour, but this would be a perfect spot for it (though he's currently fighting an uphill battle).

[Jun 5, 2021 at 4:44 pm ET · Kyle Porter]

Rahm, by the way is currently 7 clear of everyone not named Morikawa and Cantlay. Data Golf says there's a 95% chance one of those three wins the tournament when it's all over on Sunday evening.