What are the rules governing foreign players on rosters?

The rules governing how many foreigners are allowed on active rosters has varied over time. While the fairness of the rules is a hot topic for debate (on numerous threads), what I want to present to you here is the rules governing roster allowances.

What is the limit on foreign players?

Currently there is no limit to the number an organization can sign. However, only 4 foreign players are allowed on the 25-man game roster, with a maximum of 3 position players or 3 pitchers. There can not be 4 position players or 4 pitchers at one time. 3 position players and 1 pitcher, 1 position player and 3 pitchers, or 2 of each are all possible.

Starting in 2006, each team may also have an Asian player excluded from the foreign player limits. That is to say, a native player from one of the other leagues in Asia - KBO in Korea, CPBL in Taiwan, or CBL in Mainland China - may be included on the top team's active roster without counting against the foreign player limits.

Wasn't the limit ___ foreigners before?

Limits in the past:

The position of player on the roster does not need to be the position he plays on the field. (It is still being looked into whether all four players may enter the game as position players or pitchers.)

If a player listed on the roster as a pitcher enters the line-up as a position player, he is counted as a position player.

A player listed on the roster as a position player may enter the game as a pitcher.

What is the deadline for signing foreign players?

The deadline for signing new foreign players is the same as the trading deadline of June 30th.

What about naturalized citizens of Japan?

Because they are considered Japanese, of course they are not counted as foreign players.

Why wasn't Yasuaki Taiho (Chen Tai-feng) considered a foreign player?

Taiho signed with the Dragons under the rule that states if a player lives and studies in Japan for five years or more, they are treated as Japanese players. After graduating from college in Japan, Taiho worked for one year at Chunichi as a trainee, and thus was able to sign with Chunichi without using a foreign player spot.

Currently, the rules for foreign players to be treated as Japanese players is as follows:

What about players who reach free agency?

Since 1997, foreign players who qualify for free agency in Nippon Professional Baseball (NPB) no longer count as foreign players. Only Taigen Kaku (Kuo Tai-yuan) of the Seibu Lions and Tuffy Rhodes of Kintetsu, the Giants, and Orix have qualified under this rule.

Sources

Primarilly from the fj.rec.sports.baseball FAQ, Japanese Basball section maintained by Shin'ichiro Nishizaki
Translated by Joshua A. Reyer (a.k.a. CFiJ)
Asian exclusions added by Michael Westbay (a.k.a. westbaystars

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