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Mike Clay's top-240 dynasty fantasy football rankings

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What the experts value when making dynasty picks (2:30)

When drafting in a fantasy dynasty league, age could factor in to positional shelf life. Field Yates and Mike Clay evaluate how age relates to player values and what the return on investment should be. (2:30)

Here is an updated set of rankings for those of you in keeper and dynasty leagues, including this year's top rookies. Although a PPR scoring system is assumed, keep in mind that a switch to non-PPR would yield only minor changes, because we're looking at each player's long-term contributions.

Player ages listed are as of the projected season opener for the 2017 regular season.