Matt Leinart sprained his left shoulder in the Cardinals' game against the 49ers on Sunday, ending the quarterback's strong rookie season one game early. Leinart was hurt when Roderick Green sacked him on third down during a drive that ended in Neil Rackers' 39-yard field goal with 1:57 left in the second quarter. Leinart went to the locker room after the hit, and returned to the sideline in street clothes as Kurt Warner finished off the Cardinals' 26-20 victory.