Masters forecaddie: Running analysis of Round 4 at Augusta National

Stay tuned throughout the day as theScore updates you with insights and analysis from Round 4 of the Masters.

It's not an exaggeration to say that may have been the most dramatic Masters ever.

Rory McIlroy took us on a wild ride Sunday at Augusta National, capped by a playoff victory over Justin Rose to claim the career grand slam.

Below was our running analysis and updates throughout the final round. (All times ET.)

7:15 p.m. - Rory McIlroy does it! He becomes only the sixth player to win the career grand slam, joining Tiger Woods, Jack Nicklaus, Gary Player, Ben Hogan, and Gene Sarazen. What an incredible major championship.

7:10 p.m. - Both players hit the green with their approach shots, but McIlroy's rolls back down the slope and settles in tight. Rose will need to repeat the 18th-hole magic that got him into the playoff.

6:53 p.m. - We have a playoff. McIlroy misses a 5-footer on the last, dropping back to 11-under with Justin Rose. This is the first playoff at the Masters since Rose lost to Sergio Garcia in 2017.

6:46 p.m. - His approach finds the greenside bunker. Another poor wedge shot from inside 125 yards.

6:40 p.m. - McIlroy splits the fairway on 18. One more solid swing and two putts to claim the career grand slam.

6:35 p.m. - McIlroy takes a one-shot lead to the 18th. The final hole at Augusta is playing 0.17 strokes over par. It's given up eight bogeys and two double-bogeys or worse so far today.

6:30 p.m. - McIlroy stuffs his approach into No. 17 to two feet. He's now the heavy favorite with a likely birdie coming.

6:18 p.m. - McIlroy heads to the 17th tee tied for the lead at 11-under with Justin Rose, facing two holes playing over par for the day to close out his round.

6:15 p.m. - This is golf at its finest. Justin Rose drains a lengthy birdie putt on No. 18 to get into the clubhouse at 11-under. Rory McIlroy has to play the remaining three holes under par to avoid a playoff. He has a 9-footer for birdie on No. 16.

6:10 p.m. - McIlroy fails to convert the eagle, but heads to the 16th tee with a one-shot lead. He's the -300 favorite with Justin Rose at +400 and Ludvig Aberg at +550. McIlroy has to make five more solid swings to win this.

6:03 p.m. - "The shot of a lifetime!" says Jim Nantz after McIlroy bends a monstrous approach around the trees, landing on the 15th green and rolling to six feet. He will have an eagle putt left to give him a two-shot lead.

5:55 p.m. - McIlroy, Ludvig Aberg, Justin Rose (all at 10-under), and even Scottie Scheffler (-8) have a shot at winning this. McIlroy, the betting favorite at -150, has 208 remaining on the par-5 15th but may have to deal with a tree. Get to a TV as soon as possible.

5:52 p.m. - Justin Rose is the solo leader of the Masters. McIlroy bogeys No. 14 as his collapse continues. However, McIlroy remains the betting favorite at -120 because he still has a par 5 to play.

5:45 p.m. - Somehow it's tied! McIlroy makes a double-bogey on the par-5 13th while Justin Rose birdies No. 16. McIlroy remains the -200 favorite but this tournament is far from over.

5:35 p.m. - What just happened? McIlroy dumps his third shot into the water at the par-5 13th, an inexcusable error at this stage of the tournament. He goes from -2000 to -300 to win, a 20% swing in implied probability.

5:15 p.m. - McIlroy safely lands on the 12th green following a bogey on No. 11. His lead is four over Justin Rose. It will have to take a complete collapse for McIlroy not to win at this point.

5:10 p.m. - DeChambeau's struggling iron play has let him down again. He pulls another approach shot left, this time putting it into the water on No. 11. His round is starting to spiral while McIlroy looks in control leading by five.

4:55 p.m. - Another one! McIlroy cans another birdie on 10 to get to 14-under. His lead remains four over Justin Rose. McIlroy's live odds are -1200, an implied probability of 92.3%.

4:40 p.m. - McIlroy makes the turn with a four-shot lead after birdieing No. 9. His odds of winning are now -475, an implied probability of 82.6%. DeChambeau, Ludvig Aberg, and Justin Rose share second.

4:35 p.m. - Aberg birdies No. 10 to get within three of the lead. He's down to +900 on the oddsboard. Rose pours in his second-straight birdie on No. 12 to also get to 9-under par. The chasers are coming!

4:30 p.m. - Xander Schauffele, who's hitting his irons among the best in the field, hit his tee shot on No. 12 roughly 20 yards short and into Rae's Creek. Something to keep in mind as the leaders make the turn.

4:10 p.m. - Another pair of pars gives McIlroy a three-shot lead into the par-5 eighth. McIlroy bogeyed No. 8 on Saturday, and DeChambeau has birdied it in back-to-back rounds.

4:05 p.m. - Oh my goodness! After an errant drive on No. 7, McIlroy hoists his approach up and over the trees and lands it within feet of the cup. His miraculous recovery shot moves his live odds from -260 to -430.

3:55 p.m. - McIlroy (-12) and DeChambeau (-9) exchange pars through Nos. 5 and 6. DeChambeau hit his best iron shot of the day on No. 6, which could be a big boost for the remainder of the round. Ludvig Aberg (-8), Scottie Scheffler (-7), Corey Conners (-7), and Justin Rose (-7) are lingering.

3:35 p.m. - DeChambeau's inaccurate tee shot costs him, as he drops another stroke. Meanwhile, McIlroy rolls in another birdie for the third two-shot swing in four holes. McIlroy leads by three and is a -200 favorite again.

3:25 p.m. - DeChambeau has hit three full iron shots today, and they have all been hooked. His approach into No. 2 was long and left, his tee shot on No. 3 was left of his target, and his shot into the par-3 fourth missed long and left.

3:15 p.m. - McIlroy and DeChambeau are exchanging blows. McIlroy rolls in a slippery 9-footer for birdie while DeChambeau three-putts to trail by one. McIlroy becomes the betting favorite at -150.

3:10 p.m. - As expected, DeChambeau hits iron on the short par-4 third but fails to give himself a good angle into the tricky green. McIlroy hits driver but leaves himself with a tough pitch up the hill. He will have to hit a perfect pitch in order to keep it on the green.

3:05 p.m. - DeChambeau takes the lead with a birdie on No. 2, while McIlroy makes par. McIlroy hit his drive into the fairway bunker and was forced to lay up on the par 5. DeChambeau becomes the odds-on favorite at -130.

2:50 p.m. - McIlroy goes from the -200 favorite to +110 after one hole.

2:45 p.m. - It's a disastrous start for McIlroy, who doubles the opening hole to instantly give up his lead. DeChambeau makes a 7-footer for par to head to the second with a share of the lead.

2:35 p.m. - McIlroy's drive comes up 1 yard short and catches the lip of the fairway bunker. DeChambeau elects to hit 3-wood off the tee and hooks it into the left trees. A shaky start from the two leaders.

2:25 p.m. - Ludvig Aberg birdies his first hole, gaining a stroke on the field. He's one of the few chasers with the firepower to track down the leaders. He has to birdie the par-5 second to give himself a chance.

2:10 p.m. - Here's what we're looking for early from the contenders.

McIlroy: His opening drive will be extremely telling. Yesterday, he smoked one 331 yards over the fairway bunker, which led to a birdie. It will be huge for his confidence if he uncorks a similar drive. But it could be a shaky start if he's hitting his driver offline early.

DeChambeau: He ranked 47th in strokes gained: approach heading into the final round. His approach shot into No. 1 will be revealing and will let us know if he's dialled in with his irons or if he'll need another day of short-game wizardry to keep him in the fight.

Corey Conners: Not only does the Canadian need both McIlroy and DeChambeau to struggle, but Conners has to make birdies early. If he can get to 2-under through three holes, that could get the final pairing's attention. He'll likely need a round of 66 to have a chance.

1:30 p.m. - Hideki Matsuyama is letting everyone know a score in the mid-60s is available. The 2021 champion is 7-under through 17 and only birdied two of the par-5s.

12:20 p.m. - Roughly half the field that made the cut is on the course, providing some insight into how Augusta National is playing for the final round.

• No. 1 is playing at level par, conceding three birdies and three bogeys to the 27 players who've already teed off. A birdie here would pick up an important shot on the field, and there's some potential for a two-shot swing.
• No. 3 is playing over par after playing under par each of the first three rounds. The pin location is extremely tricky, positioned on the right side of the green in a very narrow section. DeChambeau laid back off the tee when the pin was in a similar location Friday. It will be interesting to see if his strategy changes while trailing McIlroy.
• Low scores are available. Brian Campbell is 5-under and Hideki Matsuyama is 4-under through 13 and 11 holes, respectively.