It's certainly not ideal, but the move would still improve the roster. An outfield of Bourn, Revere, and Mayberry/Brown is substantially better than Revere, Mayberry/Brown, and Ruf/Nix. They could even platoon Ruf with Revere if they wanted him on the active roster.
In response to PEM, there are enough teams looking for a CFer at any given point in time that they'll have to pay market value just to outbid one another.
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