The Utah Mammoth, an NHL team, has initiated legal action against Mammoth Hockey LLC over a trademark dispute concerning the use of the name 'Utah Mammoth'. The team contends that their right to the name is protected under both federal and state law. This dispute emerged shortly after the Mammoth rebranded from the Utah Hockey Club, a name used during their inaugural season in Salt Lake City after relocating from Arizona. The lawsuit claims that both the Mammoth and Mammoth Hockey LLC are unable to reach an agreement, primarily due to concerns about potential market confusion caused by their similarly themed branding.

Mammoth Hockey, established in 2014, has issued a cease-and-desist letter claiming that the Mammoth's branding could mislead customers and potentially harm their business, citing that the similar mammoth logos might confuse fans. The co-founder of Mammoth Hockey has stated that they intend to vigorously defend their trademark rights in court. This legal battle highlights the complexities and challenges of branding within competitive sports markets.