Amateurish, unprofessional, unpolished, juvenile.
Of inferior quality.
A professional sports association at the lower levels of minor league organization.
A low-ranking or inferior level among groups, professions, organizations, etc.
Inexperienced, like a tyro or novice.
Not having feathers; (of a bird) not yet having developed its wings and feathers and become able to fly.
Not yet fully grown or developed; not yet mature.