Kansas City, MO — A tense AFC showdown got even hotter after Kansas City Chiefs wide receiver Rashee Rice took to X late Tuesday night and wrote:

“I’ve seen such a delusional fan base.”

The post was clearly aimed at Bills Mafia — and it instantly went viral before Rice quickly deleted it amid backlash from Buffalo fans.

Screenshots spread everywhere, and it didn’t take long for Bills players to step in.

While several Bills veterans tried to keep the focus on football, running back James Cook decided it was time to respond on behalf of Buffalo:

“They can laugh, call our fans delusional — but on Sunday they’ll wake up to the nightmare we create. I play for the people who believe in the Bills, and I will make Kansas City pay for every word they said.”

His message ignited Bills Mafia, turning this matchup into a full-blown rivalry war.

Rice has yet to comment on why he deleted the post, but the damage is already done — and the Bills clearly won’t forget it.

With both teams fighting for playoff positioning, a game that was already massive now carries personal stakes. Buffalo has officially taken the trash talk and turned it into fuel