Is there any way a fastball can turn into a slider?

I asked a question earlier and i went and talked to my neibor and I told him what my fastball was doing he asked me how was I holding the ball and he said it was a little off center so he told me to pitch to him and the ball broke when I gripped it like a fastball is there any way it could be a slider or cutter because I was clocked at 68(only 13 here) so I'm not lobbing the ball I'm throwing hard so it shouldn't break at all when I grip it in a 4 seam so could it be a slider cutter or curve