If your playing any kind of Womens softball then yes. But for mens softball, it matters what league your playing in. Some lay overhand slow itch, overhand fast itch, underhand slow pitch or underhand fast pitch. Check with a teamate or make sure what kinda of softball you are playing
There are two different kinds of softball, fast pitch and slow pitch. Rather than try to explain I will point you to a wonderful link that will explain all. http://www.sportsknowhow.com/softball/dimension/softball-fast-pitch-field-dimensions.html
The term softball came from the way they first played, when pitching underhand was a soft, slow pitch. So it was soft..ball. You may also here the terms slow pitch for younger girls these days and fast pitch for older girls.