Here's the history of the changes to the 8th, taken from this thread:
http://www.golfclubatlas.com/forum/index.php/topic,51383.0.htmlHole 8 - Yellow Jasmine - Par 5
1934 - 500 yards - The hole played 60 feet uphill to a punchbowl style green (similar to the 17th at Muirfield) that MacKenzie his with 9 to 12 foot high hillocks. At its narrowest point, the green was only 20 feet wide, with a 45-degree turn to the left.
1957 - 520 yards - Supposedly Roberts loved the green at the 8th (nicknamed Jane Russell due to the mounds), but deemed it appropriate to knock down the hillocks for better spectator viewing. The resulting figure-eight platform green had a vertical drop on all sides. Bob Jones got angry at Roberts, telling him he was wrecking the course. For the 1957 Masters, a sign near the green explained that the change was only temporary.
1958 - 530 yards - Cobb was called in after the '57 tournament to rebuild the green and recover the shape created by Mackenzie. The result was a green flatter and wider than the original. In place of the legendary mounds, Cobb built two ordinary bunkers because of Roberts' insistence on keeping clear sight lines for the patrons. Cobb also filled in the old fairway cross bunker and created a new one farther out and to the right.
1980 - 530 yards - After Roberts died in 1977, the club asked Cobb to restore the green again. When Cobb indicated he could not recall the original shape or contours, Byron Nelson stepped in with Joseph Finger to undertake the job. He reestablished the punch-bowl green from memory and a few old photos, and even hand-raked the final contours.
2011 - 570 yards - Fazio rebuilt the green once again in 1997, creating a new back-right shelf for a Sunday pin 111 feet from the front and 18 from the right collar. In 2001, he moved the tee back 20 yards and 10 yards to the right. The fairway bunker was moved farther down the fairway, doubled in size and deepened, requiring a drive of 315 yards to clear.