Only four other players in MLB history have appeared in a postseason game with six different teams. Interestingly enough, two of the four happen to be former Blue Jays - third baseman Josh Donaldson and pitcher David Wells.
20 other players besides Scherzer have appeared in the playoffs for five different teams, including former Blue Jays John Olerud, Octavio Dotel, Rickey Henderson, and Curtis Granderson. No player has ever appeared in the postseason for seven different teams.
Postseason status still uncertain, could start game 4 for Blue Jays
Given his last two starts, it's not a 100% guarantee that Scherzer gets named to the Blue Jays' ALDS roster. With Kevin Gausman, Shane Bieber, and Chris Bassitt likely to start the first three games, Scherzer would be competing with rookie Trey Yesavage for the ball in game four. It is also possible that one of them moves to the bullpen.
Still, Mad Max has a career track record to warrant inclusion on the roster.
Whatever happens, his first appearance will be a part of history.