The checked swing appeal is something that I always try to discuss pregame when I work with a new partner. I have worked with folks that tell me to call what I see , I have worked with folks that ask me never to overrule them, and I have worked with one umpire that tried to set up a code on whether they wanted me to agree with them or make the call based on the way they asked for the appeal.
What it boils down to is that the checked swing
is not the top priority for the plate umpire, judging the location of the pitch is. Here is a link to a very good article on the subject:
http://www.cactusumpires.com/pages/s...nchor/priority