Tristan's Keeper Top 250 is based upon a player valuation formula that accounts equally for the next four seasons, as well as the fifth and beyond:
• 2015 performance: 20 percent.
• 2016 performance: 20 percent.
• 2017 performance: 20 percent.
• 2018 performance: 20 percent.
• 2019 performance and beyond: 20 percent.
Rankings are based upon a standard, mixed Rotisserie league with 5x5 scoring. Position eligibility is determined based upon a minimum of 20 games, otherwise the position the player appeared at most in 2014. Players' listed ages are as of April 1, 2015.
Players' September 2014 ("Sept. 2014") and peak rankings in past keeper lists ("Prev. Peak") are also provided: These lists have been published semiannually since 2010 plus a bonus edition last September, with "Pre" and "Mid" designated to differentiate whether the rank was in the Preseason or Midseason lists of those years. For example, Justin Upton is listed with a peak of 3 in "Pre-2012," meaning that his best all-time rank was third overall, in the February 2012 list. A "--" means that the player has never before been included in a Keeper Top 250 list.
Player rankings by position can also be seen here.