"Davis has a lot of experience as a starting quarterback at the collegiate level and that's why he separated himself from the others early in camp," new offensive coordinator Jake Spavital said in a statement. "He also played in a similar system at Texas Tech and his familiarity with what we are trying to do offensively was another major factor in our decision."
ESPN's Mel Kiper Jr. ranks Webb as the No. 1 senior quarterback.
"We felt like it was the right decision to make once separation occurred," head coach Sonny Dykes said. "Davis' maturity and knowledge of what we're trying to do put him a little bit ahead of the other quarterbacks."
Webb spent a dizzying offseason reportedly being courted by Auburn, Mississippi State and Colorado, where he originally made a commitment. The hiring of Spavital, however, is believed to have swayed Webb to Berkeley.
"College football and particularly the quarterback position is a performance-based deal," Webb said. "My job now is to prepare my best each day and do my job on game day."
The Bears open the season Aug. 26 against Hawaii in Sydney, Australia.