David Akers kicked four field goals, including winning 39-yarder late in the fourth quarter to push the San 17 at CenturyLink Field.

Akers' now has 42 field goals made this season, establishing a new NFL single- season record.

Frank Gore rushed for 83 yards and a touchdown on 23 carries, while Alex Smith threw for 179 yards on 14-of-26 passing for the 49ers (12-3), who have the NFC West crown locked up and can clinch the No. 2 seed and an opening-round bye if the New Orleans Saints fall to the Atlanta Falcons on Monday. San Francisco has won two consecutive games since losing to Arizona, 21-19 on December 11.

Marshawn Lynch did two things on Saturday that no one else has been able to accomplish against the San Francisco defense this season. Lynch finished with 107 yards and a touchdown on 21 carries. It was the first rushing touchdown the 49ers have given up this season and the first 100-yard rushing game they have allowed in their past 36 contests.

Tarvaris Jackson ended with 163 yards and a score on 15-of-28 passing, while Doug Baldwin caught a touchdown pass for the Seahawks, (7-8) who had their three-game winning streak halted.