Yes, players on an MLB active roster must get at least the Major League minimum salary, whether or not they play.
Each team has an active roster of 25 players.
Major league baseball players
Major League Baseball Players Association was created in 1966.
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Through August 31 of every year, there are 750 Major League baseball players: 25 players on each of the 30 Major League teams. Beginning September 1 teams are allowed to expand their active rosters up to 40.
There are at least 3 Major League Baseball players who have came from Guatemala.