Do you have numbers for that? BP did a study that showed pretty conclusively that the only good times to sac bunt when playing for one run are 1) when there are no outs and a runner on second and 2) when the pitcher (or someone who hits just as poorly as a pitcher - Neifi Perez for example) is batting. Same study shows that bunting a runner to second with not outs increases your chances to score one run slightly. You generally don't want to do it because it significantly decreses your chances to score more than one. http://www.baseballprospectus.com/article.php?articleid=2851 Numbers in this study show pretty conclusively that it's a very good idea to bunt when playing for one run with a runner on second an no outs. It's usually a bad idea to sac bunt with a runner on first with no outs, even when playing for one run. If you've got a different study that shows bunting a runner from 1st to 2nd raises probability of scoring one run, I'd genuinely like to see it. It's something that interests me. I am going off the strict odds of scoring situationally. Maybe your odds are based on different numbers than the one in that article. Even when playing for just one run, unless the hitter has an average below .236, the article shows there's a greater chance of scoring one run if the hitter doesn't bunt. For those that don't have access to BP premium stuff, the article isn't an anti-bunt article. It does try to find situations in which a bunt might be helpful: "There appear to be a few select game situations in which [a sacrifice bunt] remains a better option than swinging away. However, those situations are almost entirely limited to when there is a runner on second and no outs."