How Do Star Hitters Age?
With Prince Fielder and Albert Pujols hitting the free-agent market this offseason, there have been many discussions on how the two of them will age. Lots of work has been done on how an average player ages, but Pujols and Fielder aren’t your average players. Which begs the question: How do stars age, compared to the rest of the league?
One of the hardest aspects when looking at elite players’ aging curves is knowing when to consider them elite. Several hitters who are playing right now appear to be sure-fire hall-of-famers — just as long as their careers don’t do an Andruw Jones nose-dive toward uselessness. To generate a list of players who seem headed toward stardom, I selected players since 1980 who had a total of 20-plus WAR during a three-year span. Also, I took the players who generated WAR of 9.5 or more in a single season.







