Keith Olbermann discusses hitters and peak performance years
"Statistically in baseball it's very clear a hitter peaks at twenty-eight. Throw in all the hitters there have ever been in major league baseball, throw them into a computer and you find that the variance here is maybe some of them peak at twenty-eight and no months and some of them peak at twenty-eight and six months. They do not suddenly get better at age thirty-five. They do not suddenly develop power at age thirty-seven. They do not hit more home runs by a ratio of nearly three to one in their thirty-seventh year than they did in their in their twenty-seventh year. It just doesn't happen."