In 1960, both the American and National leagues still had eight teams, and both leagues played 154 game schedules
The most noticeable to do so is Jim Thorpe. Michael Jordan played in the minor leagues in baseball, never officially making it to the big leagues.
Since 1915, only two "major" leagues have been in existence; and literally hundreds (if not thousands) of players have been on teams in both leagues. During the seasons of 1914 and 1915, the Federal League operated; and baseball history officially recognizes this as a "major" league. Scores of players -- including six future Hall of Famers -- played in this league as well as either the AL and the NL; so most likely dozens have played in three major leagues. Likewise, a few entire TEAMS jumped from the Player's Association (1890) to the American Association, and then to the National League. Thus, some players went through three leagues in just over three years! I doubt anyone has played in four leagues that are presently and unambiguously considered "major."
Satchel Paige was known for playing the sport of baseball. He played in both the Negro Leagues and Major League Baseball.
The world series
No. Both the American and National Leagues must follow the same rules listed in the Official MLB Rules. The only difference between the leagues is that the National Leagues chooses not to use the Designated Hitter rule. Both leagues have the option to use that rule if they want to, but it is not mandatory for any league to use it in any game.
Rawlings has been the official baseball of Major League Baseball since 1977. Both American and National Leagues use the same balls.
In the minor leagues pitchers do not come to bat. They all use the designated hitter rules. In Major League Baseball pitchers come to bat in the National League, they do not bat in the American League where the designated hitter rule is employed. During inter-league play, the All-Star Game and the World Series, pitchers from both leagues come to bat if the game is being played in a National League park.
John Leiber Pitcher fot the Yankees Council Bluffs,IOWA Bob Feller of Van Meter, Iowa, and Larry "Butch" Biittner of Pocahontas, Iowa, both played in the major leagues.
None. They umpire in both leagues.
Both the National and American leagues schdule 164 games for each team.