If the team decides its a lost season and wants to start making trades to open up spots for the youngsters at AA, two contending teams in the NL recently lost COFs to long-term injuries, the Phillies and the Padres. One of Larnach and Clemens, and Martin could conceivably be traded to either, and if the team wants to make Bell available (and the other team wants him), two trades could happen. The Phillies are left-hand heavy in their line-up, but Clemens has had success against LHP this season, so Maybe Clemens and Martin to Philadelphia (I know Philly traded us Clemens), and Larnach and Bell to San Diego, as they also need a DH.
The return won't be big, the trades probably won't happen, and promoting 4 players at once is a big gamble, but it seems like something that could be done.