When unlocking the power of these fantasy baseball cheatsheets (or browsing the new printable PDF versions), you're presented with an option to choose which projection system you want to use. This can be very confusing without knowing the difference between each of them. Each system calculates player projections differently and one may suit your tastes a bit better than another. So, let's take you through a quick tour with some brief introductions to each:
MarcelsMarcels is a long-time staple among baseball projections and has been quite successful despite being unabashedly simple. Tom Tango developed it and considers it the most basic forecasting system one can have (so easy a monkey named Marcel could do it, he would say). The system takes the past 3 years of baseball data (weighting most recent data heavier) and regresses the players towards a mean based on age factor. Tango wrote a full introduction to the system years ago that goes into more detail and also wrote an explanation about why the HR totals are lower than some may like.
In one version of a 12-team fantasy league using 2011 projections, here is an idea of what an average fantasy hitter and pitcher would produce with Marcels (which would be used for comparison purposes when calculating a player's WERTH value):