You can only see so much in Spring Training. Everybody on the team has different instincts, speed, acceleration, and angles around the bases, so there isn't really a set "break even" point that works for everybody at all times. I didn't suggest that there was a set breakeven point that works for each batter and for each situation. I don't think anyone would think that. And I'm not really worried about RR's ability to judge individual base running skills. I am more concerned about the possibility of him not having a firm grasp on how to estimate the break even points. For those not familar the concept of the base advancement break even point, its the odds at which, for the specific situation, the run value of an attempted advancement is equal to the run value of not attempting. Let's look at the sac fly with 2 out scenario. In 2010, teams scored .37 runs with a runner at 3rd and 2 out. They scored .1 runs with no one on and 2 out. So in a perfectly average situation, we are looking at these expected run values: Just after flyout: .37 runs Successful sac fly: 1+.1 = 1.1 runs Out at home: 0 runs In that case, the BE point is 1.1/.37 = ~3:1 or 25%. That means the runner only has to be safe 25% of the time to make the send as valuable as a no send. Then you have to consider the skill of the base runner to determine if he can beat that breakeven point. Of course, that's assuming everything is average. In reality, that pre-advance run expectancy is highly dependent on the pitcher in the game and the upcoming batters. You have the heart of the order up against a scrub pitcher and your break point even is going to be higher. Ace against your pitcher? You could out at home 85% of the time and it still might be the right move. These are the kinds of things a 3B couch needs to consider BEFORE he decides whether to send a runner. "However, it's very difficult to know where that line is until you cross it. Carlos Gomez has crossed the line. Many times. There have been a few too many guys thrown out by 10 feet at home plate." The "out by 10 feet" situations aside, a manager has to be careful about looking at the outcome of his strategies too much, too early. There is just too much uncertainty about the outcome and not enough observation points. If RR thought his strategies were correct before the season started, he shouldn't change his mind on a handful of plays. Of course, many managers are very outcome driven, since there performance is measured by it.