See Wikipedia:WikiProject Baseball/Player style advice/Sample biography for an outline of a Major League Baseball player article. You can use {{subst:Wikipedia:WikiProject Baseball/Player style advice/Sample biography}} to include this text in an initial draft of a new player article.
If there is another statistic that is representative of the player's career, then it can be included as well. Examples: Rickey Henderson's total stolen bases, Mariano Rivera's total saves.
For leading the league in a statistical category, if the player has done so only in one league, prefix the achievement with "AL", "NL", "PL", or "CL" as appropriate. If the player has led both the AL and NL or PL and CL, do not prefix the achievement and list the total number of seasons led by the player across both leagues.
When a specific achievement was recorded in consecutive years, the years in which it was achieved should be listed as a range (for example, 2000–2005) and not enumerated individually (such as 2000, 2001, 2002, 2003, 2004, 2005).[4]
In accordance with Wikipedia's guidance on the lead for biographies, and to establish a player's key characteristics immediately, particularly for those unfamiliar with baseball, the first sentence or two should include the following information:[5]
Nationality
Profession for which the person is notable, namely, "professional baseball player". Link the word "baseball" to Baseball; do not link "professional".[6]
For an active player: current playing position, team, and league.
For an example, see the sample biography. Additional guidance on what information should be placed in the lead paragraph is also included in the sample.