David Kravish had 11 points and 11 rebounds for the Bears, who had five players score in double figures.
Brett Olson had 17 and leading scorer Chris Udofia had 16 points for the Pioneers. Sophomore Royce O'Neale heated up late to finish with 14 points for Denver.
Crabbe, who scored a career-high 33 against Pepperdine on Tuesday, had 17 points in the second half and helped key a decisive run to keep the Bears undefeated on the young season.
Cal (3-0) led by one at the break but quickly opened up a seven point lead behind the scoring of Cobbs and Robert Thurman. Thurman scored six quick points as the Bears went ahead 45-39 near the 12-minute mark.