But, in a post-pandemic era, the prospect of additional MLB revenue from an expanded postseason has gone from “we’d like it” to “we need it.” As a high-profile example, the New York Yankees’ ticket revenue next year could be down 33% from last year, and ticket sales might not fully recover until 2024, according to Fitch, the credit rating agency, which this week evaluated a Yankee Stadium bond refinancing.

That provides the players with some rare clout in labor talks. The players union must approve any playoff expansion, and it is no secret how badly the owners want that money. The league included an expanded postseason in each of the four offers it made the union in return-to-play negotiations. After negotiations failed and ...