These balls, made in the 1960s, contained Colbalt-60 and promised "longer drives ... longer lives." Somehow, we doubt both of those statements. Next up: nuclear pacemakers!
That's like a concept for a Golden Age comic book character: An old guy gets a pacemaker fueled by plutonium and gains superpowers! In real life, of course, they just gained a regular pacemaker, maybe with a free side of cancer. The patient would be exposed to around 0.1 rem of radiation per year, with 1 rem bringing about a 0.05 percent chance of cancer. Those aren't bad odds, but when you already need a pacemaker, why stack things against yourself?