This claim has become popular among fans, but it is false. The original source, cited from CBS Sports, suggested that the NFL rigs games in favor of certain teams, particularly the Kansas City Chiefs. However, NFL commissioner Roger Goodell has publicly stated that the league does not rig games for any team, calling the idea “ridiculous,” as highlighted in an article by Total Sports News.
Further reporting from Sports Illustrated included comments from NFL executive Peter Schrager, who explained that each officiating crew only works with a given team at most twice per season. With 17 different referee groups made up of 138 individuals, the idea that they could all collude to benefit one team is highly implausible. In fact, the very team accused of being favored—the Chiefs—were down 34–0 at halftime in their most recent Super Bowl appearance and went on to lose.
The original article being cited did not provide evidence of referees successfully altering outcomes. Instead, it merely noted that some people had approached officials, not that any influence occurred or that games were ever changed as a result. This distinction is important because it shows how speculation can quickly turn into conspiracy theories without any factual basis.
When looking at the bigger picture, officiating controversies are nothing new in professional sports. Fans often feel calls go against their team, especially in high-stakes games, but frustration is not the same as proof of corruption. The NFL, like other leagues, has systems in place to review officiating performance and discipline referees when necessary. While no sport is perfect, the evidence simply does not support the claim that games are being rigged to favor one franchise.
Sources: : NFL Refs Exec Rips 'Conspiracy Theories' of Collusion, Rigged Games 
Roger Goodell Finally Breaks His Silence On Accusations That The NFL Refs Are Cheating & Rigging Games For The Kansas City Chiefs