[AtlUmpSteve]

The only thing that makes a "double switch" in baseball anything other than standard use of substitution rules while replacing two or more players at once, is that (at least according to the talking heads) the manager must tell the plate umpire before he crosses the lines that the two subs are not batting in the same positions as the starters they appear to be replacing (pitcher for pitcher, position player for same position player). Otherwise, this just a multiple substitution, and the coach must report the subs, and who they replace, without any requirement that limits when it is reported.