"So if 500 homers was too easy during the steroids era, 3,000 hits (or close to it) is too easy now because players last longer, and 300 wins is damn near impossible forever more, what do you do? What do you do?!
The simplest way to recalibrate greatness is to use better numbers. Wins Above Replacement weighs a player's offensive contributions, his defense, his base running, the era in which he played, and several other factors, then shows you the single most important measure of any athlete's worth: the number of games he wins for his team. If you're an 85-win team and you replace a scrub with a 5-WAR player, now you're a 90-win team. That's it."http://www.grantland.com/story/_/id/6756722/derek-jeter-subtleties-greatness#