Ricky Kreklow scored 17 points off the bench while three others scored in double-digits for the Golden Bears (5-0).
Cal made just under half its shots as a team -- 47.5 percent. The Bears had 24 second-chance points on 19 offensive rebounds, and made eight of 20 3-point attempts (40 percent).
Arkansas led only twice -- once in the third minute of play and again at 35-34 after Michael Qualls made a 3-pointer to open the second half. The Bears responded with a 13-4 run in less than three minutes.
Cal built its lead to 13 points after Kravish made a layup to cap an 8-0 run with just over five minutes remaining.
Qualls led Arkansas (3-1) with 21 points.
The Razorbacks starters scored only 13 combined points. Two regular starters, Qualls and Anthlon Bell, did not start after being late to a team meeting, team officials said. Bell was Arkansas' second-leading scorer with 16 points. Rashad Madden had 10 points.
Arkansas shot 37.5 percent from the floor and only made two-thirds of its free throws.
Jabari Bird, a Cal freshman who went to high school in nearby Richmond, led the Bears in scoring for most of the game before finishing with 15 points. Justin Cobbs also scored 15, while Richard Solomon scored 11 points and grabbed seven rebounds.