It would be nice to have a way to query a player's info based on playerID (i.e. a player.aspx). Can return the same info you get on roster.aspx, but without needing to know what team the player plays for. If not your player (or even if it is), could just return the public info (salary, age, best position, game shape, etc). (This seems so obvious that maybe it's intentionally excluded, or just not listed in the BBAPI docs?).