I'm sure there are specific pitchers that really get bothered by the runner and specific hitters who don't get bothered etc but on a global level it just isn't a big deal. On a global level -- I think you are right. I think though specific situations and specific batters there probably could be a case made. Does it help a batter in the 3rd inning of a 4-0 game? -- probably not. Does it help Albert Pujols in a close game in the bottom of the ninth -- probably not, a lot of time pitchers just let the runners run and focus on the hitter (like Pujols). Does it help a proto-typical #2 hitter in a close game -- probably. I think that the problem with these global studies like Russ and Ennder refer to -- is that they are done inside of global parameters, and then applied to specific situations. When things are done globally situational events can cancel themselves out. For example, I remember reading a study that concluded that OFers would be better served to never throw the ball to the plate, but instead always hit the cutoff man. Basically there were more times when OFers stupidly threw the ball to the plate (allowing other runners to advance), than there were smart times (erasing a run at the plate), so the conclusion was based on the fact that all the smart plays were "washed out" by the stupid plays, and there happened to be more stupid plays left over. The conclusion I drew was that OFers need to become smarter. Certainly it is better to understand that trading bases for a remote chance at erasing a run is a losing proposition, however, there are times when you absolutely have to throw home regardless of how small your chance at success is. Point being, I think Jason's contentions are better made a case by case basis, and certainly not globally. The other aspect that is sort of glossed over -- is that the batter still needs to execute. That is to say -- if a pesky base-stealer causes a couple of pitch-outs and a 2-0 fastball grooved to Craig Counsell -- but Counsell hits a crappy groundball to 2b, you could contend that the runner gave the hitter a better chance at success -- but at the end of the day, the batter still needs to execute.