In this case it is true though. Think about it. If you're GM of a team and you see the Brewers put him on revocable waivers would you even bother claiming him knowing that they're most likely going to just take him off? Yeah I suppose you could say that they could force the Brewers hand and make them put McClung or Turnbow on waivers but they suck and most teams aren't going to want either of them.
So he gives you one inning, you can't bring him in with runners on, you can't bring him in on back to back days, when he gets himself in trouble he can't finish the inning. More trouble than he's worth.