Ned Yost announced he was retiring from both the Kansas City Royals and the MLB a week before the season ended in 2019. Only the San Diego Padres and San Francisco Giants knew they would look for a new manager at that point, due to the firing of Andy Green and the previously announced retirement of Bruce Bochy, respectively.
The Padres have already christened Jayce Tingler has their next coach and three teams who did not have job openings until the last day of the regular season or after have new managers in place.