How do you cheat baseball

Many ways.

These are some of the ways that pro athletes cheat. (they all have been caught)

pine tar that is more than 18 inches from the knob on a bat.

pine tar on gloves, hats, sleeves, ect. on pitchers.

steriods, HGH, testosterone boosters, ect.

corked bat

hollowed bat

worn down laces on a baseball

Those are just some but remember it is not good to cheat because you wil get caught.