The Major League Baseball Lockout is hitting home for 19 of the 30 teams. There are 11 teams who don't yet have to deal with the mess of rescheduling a home opener, because only the first week of games has been canceled.
All 81 home dates are still on the schedule. When more games are canceled, the other 19 teams have provided a template of what to do, and what not to do.
The Astros, Blue Jays, Cubs, Dodgers, Nationals, and Red Sox have not had a social media presence, and do not have information clearly available on their website. Cleveland and Kansas City have promised to contact people who bought tickets from the clubs.
StubHub and other secondary market sellers have their own cancellation and refunds policies. The policies for tickets bought directly from a team vary from city to city, with the proviso that if you bought tickets for opening day, you'll be able to use them.
There is no coordinated message that the league can put out because it does not have a uniform policy. It is up to the individual clubs to decide what to do with the money they have already collected.