The Kansas City Chiefs finally took their first loss of the season on Sunday, and while 9-1 is still a strong record to have, it caused a noteworthy shift in the NFL landscape.

The Detroit Lions surpassed the Chiefs to become the betting favorites to win the Super Bowl at several sportsbooks — for the first time in the woebegone franchise’s history.

The Chiefs were the unchallenged favorites to win Super Bowl LIX ever since notching their second straight championship last February. They remained atop odds boards despite several shaky performances and near-losses throughout their first nine games.

Before the Chiefs lost 30-21 to the Buffalo Bills on Sunday, the Lions steamrolled the Jacksonville Jaguars 52-6, scoring touchdowns on their first seven drives and never punting. Jared Goff had 412 passing yards and four touchdowns in the Lions’ eighth straight victory.

That combination of events put Detroit, a franchise that had not won a playoff game between 1991 and 2023, over the top.

“For the first time in the history of the franchise, the Lions are now the favorites (+400) to win the Super Bowl,” Fanatics Sportsbook posted on social media Monday.

At BetMGM, the Lions are a mere +325 to win the Super Bowl, with the Chiefs at +450. They’re the +350 favorites at both Fanduel Sportsbook and DraftKings, with Kansas City running second (+500 at Fanduel, +450 at DraftKings).

The Bills, who improved to 9-2 by beating the rival Chiefs, sit third on the board at each of those sportsbooks — +600 at DraftKings, +650 at Fanduel and +700 at BetMGM.