49ers-Seahawks regular-season finale moved to prime time

SANTA CLARA, CALIFORNIA - NOVEMBER 11: Quarterback Jimmy Garoppolo #10 of the San Francisco 49ers delivers a pass over the defense of defensive tackle Quinton Jefferson #99 of the Seattle Seahawks at Levi's Stadium on November 11, 2019 in Santa Clara, California. (Photo by Ezra Shaw/Getty Images) less SANTA CLARA, CALIFORNIA - NOVEMBER 11: Quarterback Jimmy Garoppolo #10 of the San Francisco 49ers delivers a pass over the defense of defensive tackle Quinton Jefferson #99 of the Seattle Seahawks at Levi's ... more Photo: Ezra Shaw / Getty Images Photo: Ezra Shaw / Getty Images Image 1 of / 8 Caption Close 49ers-Seahawks regular-season finale moved to prime time 1 / 8 Back to Gallery

The NFL has flexed the crucial 49ers-Seahawks game in Seattle next Sunday to prime time, with the NFC West at stake for both teams.

For the 49ers, a win in the Sunday night game on NBC would give them the No. 1 seed in the NFC and home-field advantage in the conference playoff. A loss could force them to play a road wild-card game.

The 49ers beat the Rams on Saturday night and are 12-3. Seattle fell to 11-4 with its 27-13 home loss to Arizona on Sunday, but it would win the West title with a victory over the 49ers because of the head-to-head tiebreaker. The Seahawks won the teams' first game this season, 27-24 in overtime on Monday night.

After their surprising loss to the Cardinals, the Seahawks got more bad news. Leading rusher Chris Carson will not play against the 49ers and appears to be out the rest of the season because of a hip injury. Also, coach Pete Carroll said backup running back C.J. Prosise is out for the season because of an arm injury, and left tackle Duane Brown is out and will need knee surgery.

The league typically waits until Week 16 to determine the prime-time matchup for the final day of the season.

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SFGATE staff contributed to this report.