Around what age do baseball players start to retire?

I agree with all these answers. I would make one further point. Having a designated hitter is a way to prolong careers of players whose fielding skills have eroded to the point at which they could no longer play in the field. read more

There is no one age at which baseball players start to retire. It is largely dependent on how good the player is. For example, a minor leaguer who has trouble progressing through the system may retire in his mid 20s. A player who gets to the majors and has some success may retire in his early 30s. read more

There is no set age for an NBA player to retire. Most retire in their 30s, while a number of players have played beyond age 40. Andre Miller (40), Kevin Garnett (40) Vince Carter (39) and Pablo Prigioni (39) are among the oldest players still active in the NBA. read more

I am looking for general patterns of peak age and seeing if these peak ages have changed over the seasons of baseball. Some Graphs. Here is a graph of the distribution of peak ages. The most common ages (frequencies of players) are 29 (99 players), 26 (95 players), 28 (86 players), and 27 (81 players). read more