[4] Zeidel played for the Detroit Red Wings and Chicago Black Hawks in the early 1950s, and concluded his career with the Philadelphia Flyers in the late 1960s.
[6] While playing for the Philadelphia Flyers, he was involved in a violent stick-swinging duel with Boston's Eddie Shack, which left both men bleeding.
[6] Zeidel died on June 17, 2014, at 86 years of age of complications from congestive heart failure, kidney problems, and dementia.
[10] A panel of neurologists, neuropsychologists, and researchers reached the clinical consensus diagnoses that he suffered from Chronic Traumatic Encephalopathy, a neurodegenerative disease found in people who have had multiple head injuries.
[10] By the time he had retired, he had suffered debilitating headaches, acute temper, odd behavior, and had made uncharacteristically rash financial decisions.