A read of tea leaves on the eve of the kickoff suggests that QB Dorian Thompson-Robinson, caught up in coronavirus testing, will sit this one out, leaving a starter who has yet to toss a pass in college. Though weak of arm, Thompson-Robinson is a playmaker and the consummate leader. On Sunday, he led the Bruins to one of the best victories under coach Chip Kelly — yes, that’s faint praise — but extenuating circumstances favored UCLA against Cal. The balance on Oregon’s offense is ideal, a challenge for Kelly’s defensive game-planning.