What is the normal protocol regarding PRs once a major deal is signed - does the BP make the first announcement, does the BP and the startup make joint announcements at the same time, or does the startup make the announcement?

For those that love baseball, the Atlantic League (minor league associated w/ Professional baseball) will test this summer a new rule where the runner can elect to "steal" first base on ANY pitch not caught by the catcher, not just after the 3rd strike as is now the rule. I realize they are trying to make baseball more exciting (as in using juiced baseball for more homers), but this possible new rule must have ol' Honus and Babe rolling in their graves.