The Kings said Saturday that an MRI determined Sabonis has a grade 1 strain. He will be re-evaluated in a week.
Sacramento opens the season Wednesday night at Phoenix and plays Utah in the home opener Friday night.
Sabonis got hurt Oct. 15 in an exhibition game against the Clippers. He is the second starter lost to injury in the preseason. Forward Keegan Murray had surgery on his left thumb and will be out for at least the first few weeks of the season.
Sabonis has led the NBA in rebounding the past three seasons, scoring at least 19 points per game in each of those years. He averaged 19.1 points, 13.9 rebounds and 6 assists per game last season.
