The team said Saturday night an MRI revealed that a protruding disk in Bogut's back is causing spasms. There's still a chance Bogut could return later in the trip, which includes stops at Indiana, New York, Boston and Philadelphia.
The injury kept Bogut out of Golden State's 107-101 overtime win over San Antonio at home Friday night. He has missed 43-of-55 games this season, mostly while recovering from microfracture surgery on his left ankle.
The 7-foot Australian center is averaging 7.1 points, 6.5 rebounds, 2.3 assists and 22.5 minutes in 12 games.