Position Eligibility:
At the beginning of the Cold Zipper season, Yahoo! Sports placed all players into positions based in part on information from official rosters, but focusing mainly on past performance. Some players appear in multiple position lists and are eligible to fill any of those positions.
Please note the following conditions that apply to a player's position eligibility.
A player's position eligibility will not be adjusted prior to the beginning of the season. (If a player in spring training is playing "new" position, that position will not appear until a player has met the criteria for a change.)
Players will not lose eligibility at a previously established position at any time. (For example, if a catcher-eligible player begins to play first base exclusively, he will remain eligible at catcher for the entire season.)
It is not possible to customize this setting within Custom Leagues. All leagues are subject to the same constraints.

Gaining Eligibility at a New Position:
If a position player makes 5 starts or 10 total appearances at a new position during this season, he will become eligible to play that position.
Pitchers need to make three starts to become eligible as a starter and five relief appearances to qualify as a reliever.
To track a player's progress toward eligibility at a new position, go to the Players section and click on Position Eligibility. For each player shown, an "E" means they are eligible at a given position, a "-" means they have not played at that position yet, and a number indicates how many games remain before eligibility is earned.
Players will not necessarily be eligible for all positions listed in their Player Profile (viewable by clicking on the player's name).