Strange because the Red Sox were looking for ways to get Lavarnway out of AAA and onto the roster. Shoppach was supposed to be better than Salty at handling pitchers, so maybe they were not quite ready to pack in the season just then.
When no deal was cut before the deadline, I think Rizzo took the first and maybe preferred option that was available, which was Suzuki. Suzuki was put on waivers right away. Shoppach was not put on waivers for a week. I don't know who overplayed their hands on this one - Cherington or Rizzo. My guess is Cherington.