PORTLAND -- Still suffering with chronic pain after multiple back surgeries nearly two years ago, Warriors coach Steve Kerr will step away from his duties for an indefinite period.
Kerr made the announcement Sunday afternoon, one day after he was unable to attend Game 3 of the first-round playoff series against the Trail Blazers at Moda Center.
Assistant coach Mike Brown, a three-time NBA head coach who guided the Warriors to a 119-113 comeback win in Game 3, will serve as acting head coach during Kerr's absence and will be on the sideline for Game 4 Monday night.
Kerr spent Game 3 at the team hotel Saturday watching the game but was in serious pain throughout, according to sources late Saturday night and early Sunday morning.
Kerr has been coping with severe side effects since the summer of 2015. Though he has said his back was improved by the surgeries, a spinal leak has resulted in frequent headaches and neck pain.
Two days into training camp in September, barely a month after his second surgery in seven weeks, he took an indefinite leave of absence, returning Jan. 22, 2016 and coaching the final 39 regular-season games as well as the postseason.
But after laboring through the 2016 training camp and the regular season -- often wearing a pain patch on the back of his neck -- the chronic anguish never went away, being by turns uncomfortable and excruciating. Kerr made it through only the first two games of the postseason.
He clearly was in discomfort during Game 2 Wednesday night at Oracle Arena and felt no better after an off-day Thursday. During his post-practice news conference Friday, before the team flight from Oakland to Portland, Kerr constantly shifted his body and grabbed his head.
"It's been there the all along, but it was manageable," one team source said of the ongoing pain. "The last few days, maybe a week, it's just gotten worse."
Kerr was unable join the team for shootaround Saturday morning, and four hours later the Warriors announced Kerr would not attend Game 3.
Kerr has tried various pain-killing drugs, as well as medicinal marijuana, in hopes of alleviating his chronic pain. Nothing so far has provided consistent relief, and some medications that have helped were offset by nausea and other side effects.
Kerr is in the third year of a five-year contract signed in May 2014. His 207-39 regular-season record is the best in NBA history by any coach over a three-year span.