PITTSBURGH (AP) — Brock Purdy threw for 220 yards and two touchdowns to Brandon Aiyuk and the San Francisco 49ers drilled the Pittsburgh Steelers 30-7. Christian McCaffrey ran for 151 yards and a touchdown for the 49ers, who built an early 20-point lead and cruised. Kenny Pickett passed for 232 yards with a touchdown and two interceptions for the Steelers.