Simplify the following text for a Grade 7 native English-speaking person.
Original: A baseball glove or mitt is a large leather glove that baseball players on the defending team are allowed to wear to assist them in catching and fielding balls hit by a batter , or thrown by a teammate .
Simplified: A baseball glove , or mitt , is a leather glove that baseball players use to catch a baseball that are hit by a batter or thrown by a fielder .