Choose a year from the menu above the left-hand list box.
Choose nine players from the left-hand list (you can navigate the
list with the keyboard or arrow keys; you can select from the
list by hitting the "Enter" key.
Checking the "No DH" box will add a Pitcher to your lineup.
When you have selected 9 players, hit either the
"Simple Lineup" or the "Tango Lineup" button.
Either button will suggest a lineup based on the real-life statistics of your players.
Tango's favored measure of batter quality is wOBA,
weighted on base average.
The algorithm employed here is a very simple-minded application of the full-on Tom Tango treatment.
Read his site, especially this thread
for more authoratative information.
RC27
RC27 is the estimated runs scored for 27 outs of the given lineup. It's computed by
figuring out how many plate appearances each player will get on average; scaling
the player's stats to that number of plate appearances; adding the stats up to produce
a team's total bases and on-base percentage; and multiplying those to come up with
a simple Runs Created figure.