no: The shirt number for the player, if they have one. If the player's number is not known, or unassigned, then you can use the – character instead.
nat: The player's nationality. Use the name of the country, or its 3-letter
IOC country code, rather than an adjective (e.g. "Spain" instead of "Spanish"). This is for the country that the player represents in international football (regardless of nationality of birth or citizenship, or non-FIFA sporting nationalities the player may use in other contexts). If this template is used in a non-FIFA context, then some other nationality might apply; however, this parameter is
never for indication of birthplace as such, which has nothing to do with football.
natvar: If the relevant flag of the country is other that its current one, e.g. |natvar=1931. (see
Template:Flagicon/doc for how to look up the available flag options for each country.)
pos: The position in which the player plays. You can use any of the four options below:
Up to 12 unnamed parameters for appearances (odd-numbered parameters) and goals (even-numbered parameters).
Microformat
The HTML markup produced by this template includes an
hCard microformat, which makes the person's details
parsable by computers, either acting automatically to catalogue articles across Wikipedia or via a browser tool operated by a reader, to (for example) add the subject to an address book or database. For more information about the use of
microformats on Wikipedia, please see
the microformat project.