The 10 longest active playoff droughts in pro sports - Article - Bardown
NHL teams on the rise after missing playoffs: Penguins, Predators, Senators, Sabres and Red Wings – Winnipeg Free Press
Sabres' playoff hopes dashed as drought hits 12 seasons - ESPN
Longest championship droughts and playoff droughts in NFL, NBA, MLB and pro sports
9 longest active playoff droughts in NFL, NBA, MLB, NHL
Mariners playoff drought stats and facts
What is the longest championship drought in major league sports and which teams have gone through it? - Quora
Mariners' playoff drought extends to 19 seasons
NFL: Denver Broncos enter 2023 with 2nd-longest active playoff drought