"I don't know if he throws a spitball but he sure spits on the ball"

In this quote, Casey Stengel is revealing uncertainty about whether somebody throws a spitball, a kind of unlawful pitch in baseball. However, he is certain that this person spits on the ball, which could be viewed as a form of cheating or deception. Stengel's use of the word "sure" suggests that he has observed this habits and is confident in his statement. This quote might also be translated as a commentary on the competitive nature of sports and the lengths some gamers will go to gain an advantage. In general, Stengel's words communicate a sense of suspicion and skepticism towards the person in question.