The Jackets ran into both the Pittsburgh Penguins and Washington Capitals during their respective championship runs, and would likely consider them rivals. However, Columbus would match up with the Tampa Bay Lightning in the playoffs for two years in a row and would likely consider them more serious rivals: once in 2019 with their historic sweep, and then once more during the 2020 playoffs in Toronto. Though the Lightning would win the series 4-1, all but one game was decided by only one goal. Game One of that series had five overtime periods before a winner was decided, the fourth-longest in NHL playoff history!