"Maybe these kids are just too young and too dumb to know about the first 13. Maybe they can't comprehend that the Braves have only won one World Series in those 13 years"

This quote by Tim Hudson is referring to the Atlanta Braves, who have only won one World Series in the previous 13 years. He is recommending that the more youthful generation of Braves fans might not be aware of this reality, as they are too young and too inexperienced to comprehend the group's history. He is suggesting that the more youthful fans might not have the ability to understand the absence of success the Braves have had in the previous 13 years. Hudson is likely attempting to highlight the value of understanding the team's history and the battles they have faced in order to value the successes they have actually had. He is likewise likely attempting to motivate the younger generation of Braves fans to make the effort to find out about the group's history and value the successes they have had.