Mahomes retired from soccer in 2017, moved to
Kansas City where her then-boyfriend Patrick Mahomes lived, and became a Certified Fitness Trainer. While in college, Brittany interned with Bobby Stroupe, who later became Patrick Mahomes' longtime personal trainer. During the 2020 global
COVID-19 pandemic, Brittany regularly filled in for Stroupe, developing workouts for her boyfriend. On December 7, 2020, the
National Women's Soccer League awarded an expansion team to an ownership group including Mahomes. The club, initially named Kansas City NWSL, took on the player contracts and draft picks of
Utah Royals FC, effectively relocating the team. In October 2021, Mahomes announced the team's re-branding as the
Kansas City Current and its plans to build a stadium for the team on the
Berkley Riverfront Park of
Kansas City, Missouri. She participated in its October 2022 groundbreaking ceremony. In December 2025, Mahomes introduced a fan-oriented apparel line in collaboration with
Amazon. The collection includes casual clothing and accessories designed for supporters of the
Kansas City Chiefs. The launch marked an additional commercial initiative associated with her public profile. == Personal life ==