Isaac Guerendo's Girlfriend Claire Stone: Fitness Star Beyond NFL Spotlight
The San Francisco 49ers have started the 2025 NFL season with impressive form. Rookie running back Isaac Guerendo has not yet made major plays on offense. However, his contributions on special teams have drawn attention. Through Week 4, he has returned four kicks for a total of 82 yards.
Team coaches see Guerendo as a valuable long-term asset. They are exercising patience with his development. Off the field, Guerendo relies on a close support network. His girlfriend, Claire Stone, plays a central role in this circle.
Who Is Claire Stone?
Claire Stone was born on February 14, 2001, in California. She is currently 24 years old and stands 5 feet 7 inches tall. Stone established her own identity well before her relationship with an NFL player became public.
She works as a fitness model and digital content creator. Her online presence focuses on workout routines, healthy living, and balanced lifestyle tips. Stone emphasizes discipline and practical advice over fleeting trends.
Family holds great importance for Stone. She frequently shares photos with her parents and speaks about their close bond. This family support extends to Guerendo, with Stone's relatives attending games to cheer him on.
Claire Stone's Career Journey
Stone began her digital career on TikTok in 2019. She posted short gym clips and snippets of her daily routines. Her consistent effort helped grow her audience across platforms.
She expanded to Instagram and YouTube, uploading longer workout videos and lifestyle vlogs. By October 2025, her Instagram following surpassed 750,000 followers.
In early 2025, Stone ventured into entrepreneurship. She co-founded a supplement brand named Flex University. The company specializes in creatine monohydrate gummies designed for fitness enthusiasts.
These gummies are marketed as vegan, gluten-free, and non-GMO products. They target gym users seeking convenient, portable nutrition options. Alongside managing her business, Stone continues creating content and collaborating with fitness and fashion brands.
How Did Isaac Guerendo and Claire Stone Meet?
The couple has maintained privacy about their relationship's early stages. Reports indicate they began dating sometime in 2025. Their first public appearance together occurred in March 2025 at the Fanfix 4th Birthday event.
Both confirmed their relationship through Instagram posts shortly after that event. Stone later shared a collection of game day photos in 2025. She described watching Guerendo play as a blessing.
Stone also includes Guerendo in travel vlogs on her YouTube channel. Their relationship appears built on mutual support, shared routines, and focused dedication to their respective careers.
Stone regularly attends 49ers games, often sitting with Guerendo's family. She also shares moments from his football journey on her social media platforms. While Guerendo's NFL role expands, Stone maintains her own professional path with equal commitment.
