Well besides vision which is likely due to the swelling, which should go down after a few says, at least it's not bones that directly affect athletic performance. Could be worse like a break in the arm or leg.
Here it's more about safety and pain tolerance. Problem is if he's running then his face is bobbing up and down with each step, which could aggravate it. There's all sorts of helmet contraptions to protect the face at bat or in the field (if those are allowed) so getting hit there again shouldn't be a concern.