I can't believe you really need an explanation, it's fairly simple. Matt Murton was productive last year, and Floyd was not. Given their ages, it could be expected to see improvement in Murton, and not Floyd. Seriously, you didn't need that explained. What I needed explained is why you think Murton's .782 OPS v. RHP "was productive" but Floyd's .765 OPS v. RHP "was not productive." Unless, in your view, the line at which a player becomes "productive" falls between a .765 and .782 OPS. The difference is, you're using splits against RHP only. Once you factor in what each player does against LHP, Murton is clearly the better option. Not to mention the fact that he's far more likely to improve on that than Floyd is at this point.