Who is Isaac Guerendo’s girlfriend, Claire Stone? All about the 49ers RB’s love life

The San Francisco 49ers have looked sharp early in the 2025 NFL. While rookie running back Isaac Guerendo has not made many moves yet, his presence has not gone unnoticed. The star has handled special teams duties, recording four kick returns for 82 yards through Week 4. Coaches still view him as a long-term piece, and patience remains part of the plan.

Away from the field, Guerendo has leaned on a tight support circle. That includes his girlfriend, Claire Stone, who shows up consistently, both in the stands and online. She has been spotted at multiple games alongside Guerendo’s family and often shares moments from his football journey. While his NFL role continues to grow, Stone has stayed grounded in her own lane.

Who is Isaac Guerendo’s girlfriend, Claire Stone?

Claire Stone was born on February 14, 2001, in California. She is 24 years old and stands 5 feet 7 inches tall. Stone built her name long before dating an NFL player. She is a fitness model and digital creator known for workout content and lifestyle posts. Her pages focus heavily on discipline, gym routines, and everyday balance rather than flashy trends.

Family matters to her. Stone regularly posts photos with her parents and often highlights how close she is to them. That support has extended to Guerendo as well, with her family attending games and cheering him on.

Claire Stone's bright career

Stone started posting on TikTok in 2019, sharing short gym clips and daily routines. Her consistency paid off. Over time, her following spread to Instagram and YouTube, where she added longer workout videos and lifestyle vlogs. By October 2025, she had crossed 750,000 followers on Instagram.

In early 2025, Stone stepped into business. She co-founded a supplement brand called Flex University. The company focuses on creatine monohydrate gummies aimed at gym users who want something simple and portable. The gummies are marketed as vegan, gluten-free, and non-GMO. Alongside running the brand, Stone continues to create content and partner with fitness and fashion labels.

How did the couple meet?

Guerendo and Stone have kept the early days private. Reports state the two began dating sometime in 2025. They first appeared publicly together in March 2025 at the Fanfix 4th Birthday event. Soon after, both confirmed the relationship through Instagram posts. Stone later shared a game day photo dump in 2025, calling it a blessing to watch Guerendo play. She also features him in travel vlogs on her YouTube channel.

Their love life moves quietly, built around support, routine, and shared focus.

Also Read: Who is Graham Mertz’s girlfriend, Alexis Loomans? All about Texans QB’s love life




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