"Close don't count in baseball. Close only counts in horseshoes and grenades"

This quote by Frank Robinson is a tip that in baseball, close does not reduce it. It's not enough to come near to winning, you need to really win. This quote is a metaphor for the concept that in baseball, you need to go right to be successful. It's insufficient to be close, you need to go across the finish line. The quote also indicates that in various other activities, such as horseshoes and also explosives, coming close is enough. This is because in those tasks, the goal is to obtain as close as possible to the target, as well as being close suffices to win.

In baseball, however, close does not count. You have to go all the way to be successful. This quote is a tip that in order to be successful in baseball, you have to place in the effort as well as copulate. You can not simply be close, you need to in fact win.