Help:Full narrative popup

Ideally, each person in the Encyclopedia will have a short narrative describing their career and any interesting facts about their career and life.

The style of the narrative is entirely up to you, but if you don't feel comfortable starting from scratch, consider this rough outline:

Early life – including hometown (often different from place of birth), participaton in baseball and other sports (for example, Grady Sizemore was a football star).
College and/or early professional career – this might start with getting drafted, cover some time in the minors, and end with a move to the majors.
Major league career – For players who reached the majors, a concise account of their time there. This may include more than just performance – contract negotiations, for example, are well within the domain of baseball research.
Life after career peak – Managing, going back to the minors, running a bowling alley.
Notable non-baseball facts. An example is that Matt Stairs plays and coaches amateur hockey, and has permission to play in the offseason written into his contract.

There is much more information on writing about people in the Help section - click on the link at the left of any page.