Completely misses the point.
If at whatever point he's needed he'll be called up. If they were worried about his clock at all, one of Bourn or Bonifacio would have been kept as a left-handed option in CF rather than Stubbs or Francoeur.
I don't think anyone's ever suggested we may keep Mallex down to keep his clock from starting. He'll be 23 soon and has never been seen as the kind of guy you're extremely worried about losing or having to pay too early.
I like Mallex but even I see him as a guy who has good value for 4-5 years or so, at best.