Pitcher Perfect: Why can't anyone throw a baseball faster than 100 mph?
In almost every measurable physical activity, athletes show improvement over time. Jumpers jump higher and farther, and runners and swimmers go faster. Since the late 1950s, the high-jump world record has improved by more than 10 percent, the 100-meter-dash mark has improved by 5 percent, and swimming's best 100-meter freestyle has dipped 12 percent. Pitchers, though, don't seem to be getting any faster. Noam Scheiber of Slate looks into the physics of pitching.