"I've only read two books in my life: Baseball Sparkplug and Love Story"

This quote by George Brett is a funny way of expressing his absence of interest in reading. He is suggesting that he has just check out two books in his life, and they are both books that are not always thought about to be literary classics. Baseball Sparkplug is likely a book about baseball, and Love Story is a popular love book. By discussing these 2 books, Brett is recommending that he is not a fan of reading which he chooses to invest his time doing other activities. This quote is a lighthearted method of revealing his lack of interest in reading, and it is a funny way of revealing that he is not a fan of literature.