A Bermudian who campaigned on behalf of his sick son has died at his home in the US after he lost a two-year battle against cancer.Marvin Brock, 72, an athlete, martial artist and keen follower of Chinese traditional medicine, worked for almost 20 years to raise money for the treatment of his son, Mihdi, who was born with a rare spinal disorder.The father of seven began the fight for his own health two years ago after stage four prostate cancer was diagnosed.Mr Brock, who lived in Portland, Oregon, struggled to meet his own bills as his courses of eastern medicine were not covered by insurance.Mihdi, who is one of four children from Mr Brock’s first marriage to Claire Quinlan, had surgery to correct his spinal curvature.Mr Brock discovered he had cancer five years later, when he was aged 70, and had to appeal for assistance with his own treatment with Chinese medicine to battle the disease.Mr Brock’s martial arts studies started when he was 11, after the late Barbara Ball, a doctor and judo practitioner, recommended the sport to help with his chronic asthma.He majored in communications and radio at Shaw University in Raleigh, North Carolina, and became a radio journalist at the WKIX station in Raleigh.Mr Brock also brought the London Taxi Bermuda service to the island and founded his own insurance firm. The convert to the Baha’i faith was also a keen cyclist and runner.Mr Brock moved to California after his marriage to Erica Toussaint, and the couple relocated to Oregon in 2013.He remained optimistic even as his health declined.Mr Brock told The Royal Gazette last year that he hoped to get well enough to come home to Bermuda and run a half-marathon. Mr Brock said: “The first thing I want to do is stand. The second is to be able to walk.“If I can do those two things, I’ll be very happy.”Mr Brock’s obituary said a celebration of his life and burial would be held in Eagle Creek, Oregon.