The MLB health manual expanded from 67 pages to 101 pages for baseball to be played in 2020 amid the coronavirus pandemic.
It includes keeping a six-foot distance while arguing with an ump.
Pitchers can't lick their fingers, but are permitted to carry a "wet rag" to moisten their fingers on the rubber.
Hitters will have to bring their own pine-tar rags, bat donuts and other equipment to and from the on-deck-circle.
No high fives or spitting, including saliva, sunflower seeds, peanut shells or tobacco.
Batting practice baseballs can be used for only that day, then be cleaned and sanitized and not reused for a minimum of five days.