I think the minor league (and Japanese league) translations are pretty well nailed down these days. See http://www.baseballprospectus.com/statistics/minoreqa.p

I think the minor league (and Japanese league) translations are pretty well nailed down these days. See http://www.baseballprospectus.com/statistics/minoreqa.php http://www.baseballprospectus.com/statistics/minoreqa.php Of course, there is a huge amount of volatility, due to the changing true talent level (most guys in the minors are young, and should be getting better). In addition, there's the fact that MiLB seasons are shorter, and so SSS abound. But, in the community, these translations are seen as "pretty accurate".