the average lifespan of a major league ball is 9 pitches
the average number of pitches thrown in a game ~ 140
162 games in a season
30 teams
(140*162*30)/9 = 75,600
EDIT:
The correct numbers are 143 pitches per team on average which is 286 per game. According to MLB they use 65 balls per game. 30 teams have 162 games, but each team has to face another team so the number would be 15*162 which yields 2430. Multiply 2430 by 65 and you get 157,950. There's your number!
It varies from season to season.
Alex Rodriguez made the All Star team 12 times from 1996-2008 with the exception of 1999
Norway, the town too small to keep a high school, has sent three players to the major leagues and several to the minor leagues.
2 many
164
The 2011 season is his 18th as a major league player.
the lifespan of 1 is 7 pitches.
The 2012 season is Alex Rodriguez's 19th in the major leagues.
In the Major Leagues, he played 24 season, from 1905 to 1928.
It varies from season to season.
Well, in the Major Leagues in 1981 there were 26 teams, 12 in the National League and 14 in the American League. Each team had 25 players. So that means there were 650 players in the Major Leagues at any one time.
50
194400
Both the National and American leagues schdule 164 games for each team.
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.
They hit 5693 Regular Season Home Runs AL - 2688 NL - 3005 ML - 5693