Antonyms for knowing the score

capable:

impotent, inefficient, incapable, ignorant, incompetent, unskilled, clumsy, untalented, stupid, powerless, unqualified, green, unable, inept, unsuitable, weak, unintelligent, ineffective, inadequate, unskillful, useless, inexperienced.

experienced:

unknowledgeable, unfamiliar, unseasoned, untrained, unsophisticated, amateur, immature.