Update:

March 15, 2020 11:20 am EST

Commissioner Rob Manfred met with Tony Clark, the executive director of the Major League Baseball Players' Association, to discuss the potential issues sure to arise as a result of the coronavirus shutdown. Though many particulars of the 2020 season are being taken into consideration, no decisions are expected in the near-term in regard to the official start to the 2020 season.

Ken Rosenthal and Evan Drellich pull behind the curtians in this article in The Athletic. Here are excperts from the article:

A day after commissioner Rob Manfred chose to delay the start of the season, he met with the executive director of the Major League Baseball Players Association, Tony Clark, and other top officials in Arizona. The list of issues the sides must resolve is long, with topics ranging from service time and contract bonuses to practical matters of scheduling. At this point, industry sources believe it is unlikely the season will begin before May, which is dependent, of course, on the containment of the virus.

While most issues were unsettled as of Friday night, the sides did agree on one thing: The players are free to leave spring training if they want. They can continue to work out at their team’s spring-training facility (where activities will be significantly reduced), relocate to the city where their team plays or head home.

In an illustration of the chaos the sport faces at the moment, some players and agents expressed concern that players leaving spring training could impact another area: player compensation. Those players and agents feared if a player left camp, he would make it easier for his team to withhold pay before the beginning of the season.

[…]

While Trump’s decision appears to give MLB the right to withhold pay, Manfred is not inclined to take such a hard-line position, a source said. One possibility under discussion is the owners advancing players some of their 2020 salaries. Major leaguers are not paid until a season begins, going through spring training on a healthy per diem.

Compensation, though, is but one of many subjects under consideration as the sport enters uncharted waters.

Baseball revolves around a typical calendar of 162 games in 186 days. While it is technically possible baseball will fulfill its preference of playing 162 games in 2020, a shortened regular season appears more likely, making service time a potential issue.

[…]

No road map exists for any of the issues MLB and other professional sports leagues are facing. No one can predict when play will resume, making it all but impossible to plot the future.