Dozens of balls are used per game, not just one, but yeah in principle they could check them. The only reason I can imagine it being hard is the balls get prett

Dozens of balls are used per game, not just one, but yeah in principle they could check them. The only reason I can imagine it being hard is the balls get pretty banged up from dirt, bats, sweat, etc. — not sure how well illegal grip substances would survive.