'It's a bump in the road': Byron Center man conquers health and Ironman competitions and last updated 2021-04-21 19:50:13-04 BYRON CENTER, Mich. â A Byron Center man has gone from flatlining to thriving after surviving both a heart attack and a double-lung transplant. Jim Oldfield has now participated in more marathons, triathlons and Ironman competitions than he can count. He told FOX 17 itâs all thanks to his family, doctors, and a sizeable dose of old-fashioned grit. Oldfield calls his small-but-well-equipped home gym his "domain" and is a true testament to his journey that started traumatically in 2003. He said, âIt was 5:35 a.m., because I just put out my last cigarette, just put it out, looked at my watch and I went black.â