The Detroit defenceman was on the ice when the Red Wings scored the first goal against Calgary in Game 1 of their first-round series. In his 23-season career, Chelios has been relegated to watching the playoffs only once. He has won two Stanley Cups.
Hall of Famer Ray Bourque held the previous mark, appearing in 21 postseasons.
Chelios, 45, became the second-oldest player to be in the playoffs and trails only Hall of Famer Gordie Howe, who was 52 when he played with Hartford in 1980 after a stellar career with the Red Wings.