#1: © Charles M. Conlon, ca. 1923, Andy Coakley, Columbia University coach
#2: © Nickolas Muray, ca. 1927, Babe Ruth (Hand holding baseball)
#3: © Charles M. Conlon, 1919–25, Charles Robertson (White Sox) holds baseball
#4: © Leslie Jones, 1934-1956, Non-Boston and miscellaneous, baseball in hand
Great pitchers use a variety of different baseball pitches, pitch speeds and movements to gain competitive advantage against the batter. Although learning a new pitch can be fun, it can also be difficult. The learning curve is steep; learning to throw a new pitch requires a lot of practice (and patience). If you want to learn more about pitching check this guide.