Before I make my response to you, I got a question. Which definiton of prolific are you talking about.
1 a prolific artist, writer etc produces many works of art, books etc
2 an animal or plant that is prolific produces many babies or many other plants
3 literary existing in large numbers: the prolific bird life
— prolifically adverb
For example, whats this mean? "I know that the Cowboys have had great QBs not none your 'prolific' passer"