SAN FRANCISCO — Delanie Walker caught a 32-yard touchdown pass from backup quarterback Colin Kaepernick, Alex Smith handed off five times before calling it a night and San Francisco wrapped up the preseason with a 35-3 win over San Diego on Thursday.

SAN FRANCISCO — Delanie Walker caught a 32-yard touchdown pass from backup quarterback Colin Kaepernick, Alex Smith handed off five times before calling it a night and San Francisco wrapped up the preseason with a 35-3 win over San Diego on Thursday.

Walker returned to action for the first time since the exhibition opener after he injured his right knee during practice on Aug. 12. He missed time late last season with a broken left jaw before returning for the NFC championship.

Seahawks 21, Raiders 3

At Seattle, rookie quarterback Russell Wilson played just one quarter in his final tuneup before the regular season, so high-priced backup Matt Flynn led Seattle on three scoring drives.

The Seahawks (4-0) closed out the second perfect preseason in franchise history with a win over Oakland (1-3).

Wilson saw limited action just days after winning the quarterback competition and being chosen the regular-season starter. Flynn played most of the second and third quarters.