Joe DiMaggio played 13 Seasons (1936-1951) for the New York Yankees, losing 3 years (1943-1945) to military service.
5 years
The 2011 season is his 18th as a major league player.
Barry Bonds played 22 seasons in the Major Leagues.
30 teams
The Negro leagues were US professional baseball leagues. The term is usually used to include 7 leagues, also called "Negro Major Leagues" which began in 1920.
Joe Dimaggio hade two brohers in the MLB, Vince and Dom were their names.
To many to count
Reynolds spent many years in the minor leagues. At the age of 28 he moved up to pitch in the MLB. He had a 13 year career.
About 1500
As far as I know, there are two major ones in the US.
10 seasons.
Robinson did not pitch in the major leagues.