Originally Posted by RANDY IN INDY
The slider has been around for a long time. They just didn't always call it a slider. Hard curve, or fast curve, was a term used by a lot of old timers. My grandfather was a catcher and played in the 30's and he always talked about the "hard fast hook" or curve that a lot of pitches threw at that time. His description of the pitch and how they threw it is the same pitch as the slider.
Nickle curve was one name, for it, I also think its what the 19th century guys called a off shoot curve