Starting Positions: C, 1b, 2b, 3b, SS, UT, 3 OF, 6 pitchers
Bench: 8 players of any position
11/29/09: Owners may only bid on any player if: (a) there is enough room on the owner's roster for another player, and (b) the dollar amount of said bid, plus the owner's total paid salary, plus the sum of all active bids does not exceed $260. If either (a) or (b) are not true, the owner may not bid.
As far as I can tell after your bench is filled, and the only spot you have left is catcher, you can't make another bid on anything but catcher. Find another way to get/trade Weiters.
You're mistaken. All players are eligible for roster - even if that means they must sit on the bench.