The Mexican League Rookie of the Year Award is presented annually to the most outstanding rookie in the baseball Mexican League, as selected by a vote of members of the press. The award was established in 1937, with Alfonso Nieto as its first recipient.
To be eligible, players must meet the following conditions: be Mexican; pitchers must not have more than 40 innings pitched; position players must not have more than 70 appearances; and they must not have played at the Double-A level or higher in the United States, or in equivalent levels abroad or in independent leagues.