The outer layer of a baseball is made of leather, so it is made from the skin, or hide, probably of a cow or bull.
Usually around five baseball gloves can be made from one cow hide.
Today's basketballs are made out of rubber, not cow hide.
The old helmets where made of cow skin leather
I think the football is made out of pigskin.
Depends on the type and size of gloves.
The average cow hide has several cubic yards of area. It can be calculated by laying the cow hide flat and measuring the area.
In general Leather is cured animal skin. The most common form of leather is Cow hide. So yes leather can be cow hide, but not exclusively
Your answer is in your question. Cow hide.