Dean Mercer (Aug. 28, 2017, age 47)
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Dean Mercer (Aug. 28, 2017, age 47)

Former Australian Ironman champion Dean Mercer died Monday morning after his car collided into a fence on the Gold Coast. He was 47.

According to a Queensland Ambulance Service spokeswoman, Mercer suffered a heart attack before his vehicle crashed outside a Mermaid Waters shopping center.

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(Photo by Jonathan Wood/Getty Images)