Cal athletic director Sandy Barbour was as giddy as a schoolgirl giving a national newspaper columnist a tour of Memorial Stadium and the new Athletic Performance Center under construction Tuesday afternoon. Before he took part in his growing list of radio and TV interviews, Cal coach Jeff Tedford was corralled outside the football office by a Los Angeles sportswriter eager to get the inside word on Jahvid Best. Cal hasn’t quite reached the heights of the Berkeley tree-sitters, but the No. 6-ranked Bears (3-0) are in rarefied air heading into Saturday’s Pac-10 opener at Oregon. Cal is second nationally in scoring, averaging almost 49 points a game. The Bears’ defense has 13 sacks, fifth most in the country and their 25 tackles for loss is ranked 12th in the NCAA. Best leads all of college football with nine touchdowns this season, scoring at an unheard of rate of once every six times he touches the ball. After spending his first seven seasons in the shadows of Pete Carroll and mighty USC, Tedford finally has a team that can dethrone the Trojans. Of course, USC visits Cal on Oct. 3.