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rookie（新人）

According to Major League Baseball, a player shall be considered a rookie unless, during a previous season or seasons, he has (a) exceeded 130 at-bats or 50 innings pitched in the Major Leagues; or (b) accumulated more than 45 days on the active roster of a Major League club or clubs during the period of the 25-player limit (excluding time in the military service and time on the disabled list). -- from Mariners Mailbag

根據MLB的規定，必須符合以下幾點規定，才被認為是一個 rookie：

1. 大聯盟打數小於130
2. 大聯盟投球局數小於50
3. 在大聯盟25人名單上的天數小於45（九月擴編名單、傷兵名單及兵役除外）

當然，也只有符合以上條件的球員，才能有資格角逐Rookie of the Year囉。