What is the official hat of MLB?

Related questions

1. How tight should a fitted hat be?
2. Why are there no metal bats in MLB?
3. How many tickets do MLB players get?
4. Do MLB players tape their bats?
5. What kind of bats do MLB players use?
6. What bats do MLB players use?
7. Why are the Yankees wearing a black band?
8. Why do football players run through the middle?
9. What is the difference between a baseball cap and a snapback?
10. Can a straw hat be stretched?

Tags

1. #fitted
2. #59fifty
3. #referred
4. #field
5. #baseball
6. #official
7. #major
8. #sideline
9. #often
10. #league
11. #minor