Liver Life Challenge Ambassador

Liver Life Challenge Ambassadors play a critical role in ensuring the success of American Liver Foundation’s (ALF) official endurance program, where dedicated athletes from across the country use their passion and commitment to go the extra mile for the liver community. Liver Life Challenge Ambassadors serve as key volunteers for the endurance program and bring a wealth of knowledge, experience, and passion to the table. Their leadership and dedication help the program grow and ensure that ALF can continue improving lives, increasing awareness, and advancing life-saving treatments and cures.

If you are interested in becoming an ambassador, please email Sarah Miller at

Meet our Liver Life Challenge Ambassadors!

Liver Life Challenge Global Ambassador: Jim Miller

More than 23 years ago, Jim ran his first-ever marathon with American Liver Foundation in memory of his father. That race sparked a fire in Jim, and in 2025 he plans to complete his 300th marathon. Jim is passionate about the Liver Life Challenge endurance program and is committed to raising awareness and critical funds for ALF. Serving as ALF’s first Liver Life Challenge Global Ambassador, Jim promotes local and international opportunities to run for Team ALF and will participate in the 2024 Berlin Marathon.

Liver Life Challenge Ambassador: Dr. T. Clark Gamblin

Clark Gamblin, MD, MS, MBA is an internationally known hepatobiliary surgeon with a clinical and research interest focused on cancers of the liver and bile ducts. Born and raised in Mississippi, Dr. Gamblin received his medical degree from the University of Mississippi. He trained in surgical oncology at the University of Pittsburgh, where he also obtained a master’s degree in clinical research. Dr. Gamblin came to the Medical College of Wisconsin in 2010 to lead the Division of Surgical Oncology. He is also a graduate of the Kellogg School of Management where he earned his MBA. He prides himself on clinical excellence and a team approach to research, education and clinical program building.

Serving previously as a local and national board member, Dr. Gamblin has a long history of volunteering for ALF and has generously donated to our mission, raising funds through his passion for running.  He recently earned one of the most prestigious and sought-after marathon medals, the Six Star Medal, for completing the World Marathon Majors (Tokyo, Boston, London, Berlin, Chicago, and New York City).