The sentence seems to me to be a fragment, not a complete sentence. 1) Staff is a mass (non-count) noun. The plural "staffs" is possible when the word means a walking stick, but not employees.
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AlpheccaStarsStaff is a mass (non-count) noun. The plural "staffs" is possible when the word means a walking stick, but not employees.When 'staff' refers to the employees of one company, it is generally used as a singular collective noun, though in BrE it can take a plural verb: The staff are not happy about the new timetable.
Son JamesBy the way, then, the noun of "foreman" is also a kind of plural noun like staff.Isn't it?The plural of compound words of -men and -woman follows the pluralization of men and women.