Got a team or teams in mind? Pitchers suffering from bad "luck" may be the result of a slight systematic bias. The xBABIP formula is designed to project players with large amounts of plate appearances (you can observe actual lines approaching adjusted lines as plate appearances go up just by looking at the Cubs). Guys who hit as poorly as most pitchers do tend not to get many plate appearances, so they may not be adequately represented. Also worth noting, most pitchers are told not to try to beat out grounders. With this few plate appearances, beating out a couple could make a HUGE difference in an overall line. I suspect there is more to it than that. All batted balls of a certain type are not created equal, but the system will treat them all equally. Starlin Castro will hit ground balls harder, on average, than Ryan dempster, because Castro is good at making hard contact and dempster is not. So yes, castro's speed will help him get more hits, but he's also going to hit more ground balls that elude the fielders. I suspect that if you did this exercise on Rey Ordonez you'd conclude that he was "unlucky" throughout his career, because he only had a babip of .271 and kept the ball on the ground a lot. But in reality he was just a weakling who couldn't run fast and didn't hit the ball hard frequently enough. I think that Barney may be a similar type - a better player than Rnez, but weak and not fast, so possibly prone to regularly "underachieving" his expected line. As I talk about in the comments section, the formula I'm using for xBABIP does look at HR/FB% and IFH% and uses them to adjust for power and speed respectively. It's not perfect, but it does do a pretty good job of it (though it wouldn't shock me if it was not accurate enough for extreme cases, such as many pitchers).