Seahawks vs. 49ers: 3 X-factors on offense for Week 18

The Seattle Seahawks will play the San Francisco 49ers on Saturday to determine the NFC West champion. The Week 18 winner will also claim the No. 1 seed in the conference, which includes a first-round bye and homefield advantage throughout the postseason leading up to the Super Bowl. The Seahawks need their offensive studs to show up.

We've identified three potential X-factors for the Seahawks' offense against the 49ers in Week 18.

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Sam Darnold, QB

Quarterback Sam Darnold possesses an opportunity for a legacy game. Darnold, who is often questioned for his ability to come through in critical moments, was excellent down the stretch of the historic Week 16 come-from-behind win over the Los Angeles Rams. Saturday will be emotional due to his ties to the Santa Clara area and the 49ers organization.

Jaxon Smith-Njigba, WR

Jaxon Smith-Njigba began his campaign with a nine-catch, 124-yard showing versus the 49ers in a Week 1 defeat. It was the catalyst for an outstanding season for Smith-Njigba. Offensive coordinator Klint Kubiak needs his star pass catcher to be his usual high-volume self on Saturday.

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Zach Charbonnet, RB

Zach Charbonnet rushed for a season-high 110 yards and two touchdowns in Week 17. The Seahawks offense needs to establish the run versus the 49ers. No Seahawks running back had 50 yards in the first meeting with the 49ers. It'll be key to fielding a well-balanced offense.

This article originally appeared on Seahawks Wire: Seahawks vs. 49ers: 3 X-factors on offense for Week 18