The phrase denotes a freely accessible online resource containing comprehensive statistical data and biographical information pertaining to a specific professional baseball player. As an example, one might consult this resource to ascertain the career batting average, home run total, or defensive metrics of a particular athlete.
The value of such a resource lies in its ability to provide objective, verifiable information, allowing for data-driven analysis of player performance and facilitating comparisons between different players or eras. Historically, accessing such detailed statistics required painstaking manual research; now, it is readily available to fans, analysts, and researchers alike.