Leo: Given the sentence "A man wearing a jersey with the number 13 on it is ready to bat at a ball while people in the stands look on." is it true that "A man with jersey number 13 is in the middle of a baseball game."?
Mei: OK, So, let's think first...
Me:
There are some games with bat and ball other than baseball.
Thus, the answer is it is not possible to tell.