Phil Mickelson suffered a minor shoulder injury during a workout in the gym and will miss the LIV Golf season opener in Saudi Arabia this week.
Mickelson, 54, made the announcement Monday on social media.
Ollie Schniederjans will replace Mickelson in the LIV field this week, joining the captain's HyFlyers team at LIV Golf Riyadh beginning Thursday. The HyFlyers are still looking for their first team victory.
Mickelson said he expects to compete next weekend at LIV Golf Adelaide at The Grange Golf Club in Australia.
"I'm definitely disappointed that I will miss the season opener, but I look forward to playing in Adelaide," he said.