"The more testing the better," world No. 1 Brooks Koepka said at a press conference Wednesday at TPC Southwind. "It's like anything - drug testing, driver testing. You can test as much as you want (and) you'll figure out where rules are broken, where rules aren't, and who has broken them."
At Royal Portrush, the R&A tested Schauffele's driver - and 29 others - prior to the tournament. Schauffele's failed because it exceeded the characteristic-time limit (how long the ball stays in contact with the clubface). He was forced to find a new driver before Round 1 but was not penalized for the illegal club.
Bryson DeChambeau also backed the idea of more club testing at regular PGA Tour stops and offered a creative deterrent based on NASCAR penalties.
"I think we should be tested after every win, or whoever finishes in the top five should be tested," DeChambeau said, according to Golf.com's Jonathan Wall. "It's like NASCAR. ... If you play a driver that was illegal, you take some FedEx Cup points away. So you make your money and win, that's great, but you lose half the points you made."
DeChambeau defended his penalty idea even though it contradicts Rule 4.1a, which states that a player will be disqualified for using a non-conforming driver.
"It's not like you should have the trophy taken away," he added. "You putted well, you chipped well. ... But I think there needs to be some repercussions from using something that's not under the conformance rules."
The PGA Tour has yet to comment on the idea of more club testing.