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Chris Chelios holds the record for the most games played in the NHL by a defenseman, with an impressive tally of 1,651 games over his illustrious career. Throughout his 26 seasons in the league, he showcased exceptional durability and consistency, surpassing the previous record set by Ray Bourque. Chelios' unwavering dedication and longevity on the ice solidified his status as one of the greatest defensemen in NHL history.