In "Pal Joey" Danny's Giants cap that he buried in 1968 is wrong as the Giants didn't start wearing that cap until 1977, 9 years after he buried it.
It is revealed that Jesse went to the same elementary school as Danny and Joey. But Danny says he never met Jesse's sister, Pam--who is the same age as Danny and Joey, until high school. If Jesse was in the same elementary school as Danny and Joey, they very likely would have known Pam too.