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In page Larry Zeidel:

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Zeidel promoted himself to all 1967 expansion franchises using a self-made promotion kit and resume, subsequently drawing the interest of the Philadelphia Flyers who signed him to a contract at age 39.[5] 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. Boston Bruins players yelled at him with anti-Semitic comments throughout the season after the incident.[6][7]