Re: Rick White
There is almost no reason to jump on a reliever after 10 appearances. Yes, his ERA is ugly. But it's a function of a few homers and you cannot expect that rate to continue. He has an 8:1 k/bb ratio and a 2.67 FB/GB out ratio. I'm not saying he's great.
However, if you want to distinguish between White, Mercker, or Weathers, look at their last 5 years, not the last 45 days.
Games are won on run differential -- scoring more than your opponent. Runs are runs, scored or prevented they all count the same. Worry about scoring more and allowing fewer, not which positions contribute to which side of the equation or how "consistent" you are at your current level of performance.