Getting to first base

So anyway I was just thinking about cases where a batter reaches a base on error, and whether it’s worth counting these cases in their OBPs. Whaddya know, Baseball Prospectus runs the numbers and comes to the conclusion that there’s no correlation between a player’s speed and the likelihood of him reaching a base on error. And OBP is a better predictor of runs than OBP + reached on errors. Sometimes luck is everything.