late 14c., "act of planting or fixing in the ground," verbal noun from pitch (v.1). From 1650s as "act of throwing or hurling;" specifically in baseball by 1858.
the pitching and tossing was quite exciting
pitch
pitch-and-toss
pitchblende
pitcher
pitchfork
pitching
pitchman
pitch-pipe
pitchy
piteous
pitfall