When it comes to which version of which uniform each team wears, how
does the decision-making happen on a given day for an MLB game?

Dear h2oak-ga;

Oh, what a good question! 

The decision about the ?uniform of the day? in Major League Baseball
differs from one club to the next. Typically a ball team has a uniform
or perhaps a particular jersey that they wear when they play at home
and one that is designated for games played away (Like the Yankees who
always wore pinstripes at home and gray on the road). When it comes to
a specialized uniform, in many ball clubs, including the Minnesota
Twins club for example, the uniform of the day, including the cap, is
the choice of the starting pitcher.

YAHOO! SPORTS
http://sports.yahoo.com/mlb/news?slug=citadel-2_420986_292&prov=citadel&type=story

This custom, while not written in stone for everyone is fairly widespread:

?The question that needs to be raised by all of this is, who decides
what to wear? Most teams leave the decision up to the starting
pitcher. This is great, now not only does the pitcher have to worry
about opposing batting line-ups and which pitches are working, they
now have to worry about how they look.?
A DRY HEAT
?An irreverent look at baseball from a fan?s point of view?
http://www.nowhitting.com/dryheat000119.html

Here?s a very good article on the subject about a player named Miguel
Cairo who was confused about what to do when he went from the Yanks,
where the issue is already worked out of a schedule, to the Mets,
where the equipment manager (of all people) is the one who decides the
uniform of the day. Both Yanks and Mets know about the informal
?starting pitcher decision? custom but neither of the clubs chooses to
observe it.

SSUR.ORG
http://www.ssur.org/articles/items/20050503_MetsDressed.htm

So you see, how the uniform of the day is determined just depends on
where you play ball and how they do it there.

I hope you find that my answer exceeds your expectations. If you have
any questions about my research please post a clarification request
prior to rating the answer. Otherwise I welcome your rating and your
final comments and I look forward to working with you again in the
near future. Thank you for bringing your question to us.

Best regards;
Tutuzdad-ga ? Google Answers Researcher



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Splendid work. Thanks a lot.