The Week 18 NFL schedule continues on Saturday night with a crucial showdown, and the BetMGM bonus code CBSSPORTS offers new users $150 in bonus bets if their first bet wins or up to $1,500 in bonus bets if their first bet loses, depending on the rules in their state. The 49ers face the Seahawks at 8 p.m. ET, with the winner taking the NFC West title and the No. 1 seed in the conference. Sign up for BetMGM to bet on Saturday's top games:

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Saturday NFL betting preview

San Francisco and Seattle do not need help from anyone else, as the winner of Saturday's NFC West showdown will take the division title along with securing the No. 1 seed in the conference. The 49ers beat the Seahawks in Week 1, but they are 2.5-point home underdogs in the rematch. Seattle is riding a six-game winning streak and is coming off a 27-10 win at Carolina last week. The over/under for Saturday's nightcap is 47.5. Bet on the NFL at BetMGM to get bonus bets.

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