The only limit to number  of sheets  in a workbook  is available memory,
according to:

office.microsoft.com/.../HP100738491033.aspx

Earlier versions of EXCEL may have had different limitiations. You should
be able to find the limitations of your version of EXCEL in the help file it
has. Just look for "limits".

The 255 limit you found is probably just an arbitrary limit they put  on a
dialog for creating new workbooks. Since it is a drop-down box, they did
have to put a limit there. Why they have it as high as 255, I don't know.
I would think 16 would be more than enough for 99.9999% of users. In fact,
I made my default 1 -- if I want to add additional worksheets, I can. It's
not like it requires a redesign of the workbook from scratch.

Thanks for the speedy respoonse--I have OfficeXP--I looked in
"limits" and it is just as you said--limited by available memory. So
how do you know when you have exceeded an appropriate number  for the
available memory that you have--your system just starts crashing all
the time??

That I don't know.

Have you considered using a "database" (i.e. a table in EXCEL) and
then writing a page which extracts the data for a given team? For
example, a pivot table might be able to do a lot of extraction for
you. It might be easier than maintaining 337 separate pages of data.

Or, can you download the data on the fly, for a given team, as you
need it? For example, I have an add-in that grabs various data off
the web for me when I do things related to the stock market. That
way, I don't need to download and maintain the data in my own
database.

The simple answer is... Yes... Something breaks.