The Royals could be without catcher Paul Bako and first baseman Doug Mientkiewicz next season. Both players have filed for free agency and could generate some interest.
All-Star pitcher Mark Redman is eligible to file but has yet to do so.
The Cardinals could lose some pieces of its championship puzzle. Infielders Scott Spiezio and Jose Vizcaino joined pitcher Jason Marquis as players to file. Marquis is probably the least likely to return after he was left off the League Championship roster and the World Series roster.