They have retired 10 numbers, but only one of those has no connection to Brooklyn, and none have been retired in the last 20 years. It is their policy to retire only numbers of players or managers who have been inducted into baseball’s Hall of Fame, yet it is a policy followed by only about a third of major league teams, and one that the O’Malley ownership didn’t strictly follow.

Source: Los Angeles Times May 03, 2019 01:52 UTC