"I would bet cash money that the soldier was invited some time ago to THROW the first pitch. Kerry wanted to do it, so I bet they MADE the soldier be the catcher. That is what I think happened. Of course I have no proof, but I will bet we find out soon enough."
You are probably right as usual!
Seems this was previously plan and was reported in the NYT on Friday
What is confusing is why those on the plane thought it was a last moment decision .... because they are reporting that Kerry made the announcement of where they were going when all were on the plane