MLB and the MLBPA have re-opened talks on the possibility of expanded the playoff field for 2020, per Jon Heyman. Expanded playoffs were one of the things that both sides agreed to when negotiations were going on earlier this summer on resuming the season, but when an agreement failed to come together on a complete deal and MLB mplemented the schedule for 2020, expanded playoffs were not one of the things owners could include unilaterally.
With the season starting tomorrow night, though, and with summer camps having gone reasonably well once the July 4th testing fiasco was put behind them, Heyman says that there is optimism that the two sides will agree to a deal that would expand the playoff field to 16 teams.