I would guess until we get closer to the trade deadline. You have Lewis, Lee, and to a lesser extent Clemens all have similar issues. To bring up Culpepper, someone will have to go and that will likely either be Gray or Kreidler instead of Lee or Lewis. A more logical possibility would be the Twins trade Bell closer to the deadline and maybe tell Lewis that he needs to go to 1st in a platoon role with Clemens if he is going to still be on the team when Culpepper is brought up.