Originally Posted by Nasty_Boy
Yes, 80% as a team. There are times when getting throw out stealing 2nd isn't a terrible thing like with 2 outs in the inning and a high OBP/speedy leadoff type at the plate that can lead off the next inning. I'm fine with the Reds running, but don't run just to run. They need to run with a purpose and keep the situation in mind.
I completely agree with the second part. Running only makes sense if it is situational. That's why Taveras' blunder was so bad, it did not make sense. His getting to third did little to increase his chances of scoring, especially considering how his getting thrown out severly decreased the teams chances of scoring.
Here is a chart which gives an estimate of the odds of scoring per situation.
One note, if you do the math, this chart says that a team needs to steal at a 65% rate or better in order to justify running. But that is a general sense, an average of all situations. Each situation is different.