Michael Brennan was disqualified by the PGA Tour at the Farmers Insurance Open due to a controversial rule after round one.
Disqualification After Round One on the PGA Tour
In a dramatic turn at the Farmers Insurance Open, Michael Brennan was disqualified after the first round. The PGA Tour confirmed a violation of the so-called Model Rule G-11. Brennan used unauthorized materials to analyze the greens, a clear breach of rules according to the Tour.
At the time of disqualification, the Bank of Utah Championship 2025 winner was tied for 55th place at two under par.
What Model Rule G-11 Allows and Prohibits
Enforced since January 2022, this rule significantly limits the use of analysis aids. Only PGA Tour-approved yardage books, official flag position information, and a course overview in a maximum DIN A4 format are permitted.
Handwritten notes are allowed only if made by the player or caddie based on their own observations, such as tracking rolled or played balls or subjective impressions of the putting green. Detailed measurements or analyses created by others are strictly prohibited.
The rule initially imposes a two-stroke penalty for violations, with disqualification following a second offense. The PGA Tour has not disclosed when Brennan’s violations occurred.
A Rule with Discussion Potential
Model Rule G-11 has sparked debate since its introduction. In 2022, Rory McIlroy, then President of the Players Council, defended the rule strongly, citing that many players had become overly reliant on aids when reading greens. “It’s not a huge advantage,” McIlroy said, “but it takes away a skill that requires time and practice. Green reading is an art, and these aids undermine individual strengths and advantages.”
German golfer Alex Cejka was also disqualified under this rule shortly after its introduction for using an unauthorized yardage book.
Hole locations for the third round of the Farmers Insurance Open pic.twitter.com/P4L6jEz39B
— PGA TOUR Communications (@PGATOURComms) January 31, 2026