Miller began swimming in Las Vegas, Nevada, USA. He entered his first competition at age eight with the Sandpipers of Nevada club. Born with pectus excavatum, a condition that reduces lung capacity, he took up swimming to improve his heart and breathing.

Professional Career

He currently swims for the Indiana Swim Club under coach Ray Looze. His most memorable sporting achievement includes winning a gold medal and a bronze medal at the 2016 Olympic Games in Rio de Janeiro.

Influences and Inspirations

Miller cites coaches Ron Aitken and Chris Barber as the most influential people in his career. His mother is his hero. His younger sister Catie has competed in swimming for Duke University, and his wife Ali has served as a volunteer swimming coach at Indiana University.

Challenges and Recovery

In mid-2018, Miller was diagnosed with a torn medial collateral ligament and meniscus cartilage in his knee. After undergoing a procedure to drain blood and fluid from the joint, he returned to full training in early 2019.

Technique Adjustments

After being disqualified from the 4x100m mixed medley relay at the 2019 Pan American Games for multiple dolphin kicks, Miller released a video outlining changes to his technique. He committed to using an early 2000s-style pullout to avoid future disqualifications.

Personal Struggles

Miller's father was an alcoholic who passed away on Christmas Day 2015 while living on the streets. Despite this loss, Miller won gold at the 2016 Olympics. He shared his father's story to highlight that everyone faces struggles.

Congenital Condition

Miller's pectus excavatum began appearing around age 10, causing reduced lung capacity by 12 to 20%. Diagnosed with asthma while at Indiana University, he struggled with his appearance but learned that everyone has something they dislike about themselves.

Hobbies and Interests

Miller enjoys watching films, reading comic books, playing video games, skateboarding, and spending time with his dogs. He listens to music ahead of races as part of his pre-race routine.

Philosophy and Future Plans

Miller believes in enjoying the process of achieving goals. He launched a YouTube channel in 2017, detailing his life as a professional swimmer. By May 2021, it had over 166,000 subscribers. He also runs an online clothing label.

Miller's journey reflects resilience and dedication both in sports and personal life. His story continues to inspire many aspiring athletes worldwide.