Here is a list of all the former Cubs who are eligible for this year’s postseason, including those traded away or who departed as free agents before the 2021 season (note, only players who actually played for the MLB Cubs are included, not players who only played in the Cubs minor league system such as Daniel Vogelbach):
Giants: Kris Bryant, Tommy La Stella
Brewers: Brett Anderson
Braves: Jesse Chavez, Joc Pederson, Jorge Soler
Cardinals: Jon Lester
White Sox: Billy Hamilton, Craig Kimbrel, Ryan Tepera
Astros: Brooks Raley
Yankees: Aroldis Chapman, Anthony Rizzo
Red Sox: Kyle SchwarberThe Dodgers and Rays have no former Cubs.