On average pro baseball players have 20/13 vision

The average vision of a person is 20/20. However the average visual acuity of professional baseball players is about 20/13. This super-sharp vision enables them to gauge the speed of the baseball and see which way it is spinning.

https://www.baseballamerica.com/stories/scope-and-rope-a-visual-profile-of-major-league-hitters/

http://xtremesight.com/documents/A%20Visual%20Profile%20of%20Major%20League%20Hitters.pdf