Only the top eight shot-putters move on for three final rounds and the rest are out.
Longtime anchor putters like Tim Clark and Carl Pettersson, among others, are strongly opposed.
But they are handy with their irons and capable of getting hot with their putters.
"I changed putters for the first time in probably two years, " said Campbell, who carded seven birdies.
Today's swimmers, sprinters, pole vaulters, shot putters, divers and long-jumpers are considerably better than their 1992 predecessors.
They are excellent putters as McIlroy had only one three-putt all weekend, that coming on the 71st hole.
At several elite junior tournaments this summer, more than half the field employed anchored putters, according to Golfweek.
With Adam Scott's win at Augusta last month, anchor putters have now won four of the last six majors.
WSJ: Don't Make Golf Too Easy | Golf Journal by John Paul Newport
Stricker, one of the game's best putters, told Woods to keep his hands more in line with the ball.
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The use of "belly" or "long-handled" putters fixed to the body has sparked debate in golf for the last two seasons.
CNN: Golf rewrites rulebook to ban 'anchored' putters from 2016
Bradley, 26, and Simpson, 27, started using belly putters when they were in college, simply because they putted better that way.
Players with bad backs will still be able to use long putters, they just can't press the end against their bodies.
So far, nine tour players who use anchored putters have hired lawyers.
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Claude Harmon, swing coach to Els, questioned why the decision had been made now despite belly putters being around for many years.
He won silver in two previous Olympic games, but Nelson didn't get close in Friday's competition, which was also a disappointment for other American shot-putters.
Current broomstick users, by moving their putters away from their chest and creating an un-anchored fulcrum with their top hand, could still make a pendulum stroke.
WSJ: Don't Make Golf Too Easy | Golf Journal by John Paul Newport
Long putters themselves would still be legal under the ban.
WSJ: Don't Make Golf Too Easy | Golf Journal by John Paul Newport
Incapacity benefit, paid to people too ill to work, was brought in to replace the widely abused invalidity benefit, whose recipients turned out to have included shot-putters and mountaineers.
If the respective major tours were to go their own way it could lead to a situation where players could use different putters in events on either side of the Atlantic.
CNN: Golf's major tours split over proposed belly putter ban
The prospect of a ban has prompted several longtime anchor putters on Tour, including Bradley, Carl Pettersson and Tim Clark, to say they will fight such a ruling any way they can.
"None of the best putters in the world use a belly putter and I know from talking to guys like Ernie, like Keegan Bradley and Webb Simpson, I think they do feel a little bit that there's a target on their back, " added Harmon.
The old woods, irons and putters that Ellis began gathering up in 1974 for as little as a dollar apiece have the traits that go a long way toward making a set valuable--age, maker, the degree of innovation different pieces represent, rarity and condition.
They promised a decision by the end of the year (Wednesday qualifies) and specified that any proposed change would not concern the length of putters per se that is, it would not be an equipment regulation but rather a rule of golf concerning the anchored stroke itself.
The issue of the use of long-handled belly putters was drawn into sharp focus by the success of golfers such as American Keegan Bradley, the first to win a major using the technique, and veteran South African Ernie Els, who claimed the British Open last year after switching to the method.
CNN: Golf's major tours split over proposed belly putter ban
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