Brisbane’s club doctor thought Jonathan Brown was about to die after his sickening collision with teammate Mitch Clark in 2011.

In Brown’s biography, Jonathan Brown: Life and Football, he details the head knocks that ultimately forced him to retire last year.

Author of the book, Adam McNicol quotes Brisbane club doctor Paul McConnell, who said he believed the Brisbane champion was going to die after his 2011 collision with Mitch Clark.

“To sum it up in layman’s terms it was clear that something was seriously wrong with him,’’ McConnell said.

“He started what is called Cheyne-Stokes respiration which is an irregular breathing pattern often seen in the last days of a patient’s life.

“I have had a lot of experience working in intensive care and accident and emergency units and I honestly thought he was going to die.

“Thankfully an ambulance arrived very quickly. He didn’t move at all until we started moving away from the Gabba.

“I would say he was totally and utterly unconscious for at least five minutes, maybe six or seven.

“It was one of the worst injuries I have seen in my life. In all honesty I wasn’t confident that he was going to survive until he started moving his limbs as we were driving up the ramp into the Princess Alexandra Hospital.”