BERKELEY, Calif. (AP) -California receiver DeSean Jackson isn't sure he'll play in the 110th Big Game after sitting out of Tuesday night's practice because of a bruised right leg.

Jackson, who has 60 catches for 681 yards and five touchdowns this season, severely bruised his quadriceps during a second-quarter punt return in Cal's loss at Washington on Nov. 17. The junior missed the rest of the game, and a week of rehabilitation hasn't healed him completely before Saturday's meeting with archrival Stanford.

``I'm feeling pretty good, but still not back to where I want to be,'' Jackson said. ``Closer to game time, I'll see how I feel. ... Every year I've played in the Big Game, it's been one of those great years. It would be good to keep that tradition going on. Right now, I just want to protect my knee from whatever it is.''

Jackson's knee aches when he moves on it because of the bruise, he said. That's a debilitating problem for a player whose game is based on speed, both as a receiver and a punt returner.

Jackson is expected to declare his eligibility for the NFL draft after the season, perhaps further complicating his decision to play on an injured leg.

``We want to go out on a note showing everybody we are an explosive team,'' Jackson said.

Cal already will be without freshman tailback Jahvid Best, who's likely out for the season with a hip injury. Best, Cal's second-leading rusher with 221 yards, was hurt while blocking on a kick return at Washington.

Best still holds out hope of returning for a bowl game, though California coach Jeff Tedford said his prized youngster's season probably is over.

``It scares me a little bit, but I think it's more precautionary,'' said Best, who's making his way around campus on crutches. ``We're trying to play it safe and make the smartest decision.''