Cory,
What is the purpose of the 13th player on the roster? To be a positive teammate, generally be a veteran because they are getting minimal opportunities, yet be effective when called upon. He was called up due to Jeffers injury and did well in limited time. The risk of DFA him again is that someone would likely claim him. Now after a rash of catcher injuries- its a guarantee someone will claim him. There are zero options in the minor leagues currently so if Caratini or Jeffers got hurt we would be SOL.
There are 5 other teams that carry 3 catchers and that number will increase in Sept. He has shown he can be a pinch runner, has a BA above .300 and provides good defense at catcher. So why is there such an urgency to get rid of him? I really don't get it.
If you bring one of the young players up they are going to have to get significant run. Hence why it will likely be Martin, Roden or possibly Culpepper.