23% of walker's AB's were against lefties, which is slightly higher than soriano's. i don't see much of a difference. stats may lie, but they aren't the liars that eyes are. The Cubs, as a team last year, faced lefties 28.4% of the time (Walker faced only 22.9% lefties). The Rangers last year faced lefties only 23.8% of the time (Soriano faced about the same—22% lefties). (Walker has batted against even fewer lefties (21.4%) over the past three years. Soriano has batted against lefties 29.2% of the time during that three-year span.) There appear to be some statistical trends over time. Walker gets taken out of the line up against lefties because, over the last three years (and at least four), he doesn't hit them as well as he does lefties (and I'd bet that he usually doesn't hit against the toughest lefties). If the current trends continue Walker will bat against fewer lefties than Soriano (and, IMO, the lefties he bats against will be the “weaker” lefties). If the current trends continue Walker will continue to hit against righties and fewer lefties thus increasing his BA, OBP, SLG, OPS, etc. vs. what he would have done had he faced his team’s % of lefties. If the current trends continue Soriano will play against just about anyone (because he isn't replaced by managers for PH, PR or defensive subs) and frequently lead his league in innings at 2B thus giving you more value.