by gamiam » Mon Jul 03, 2006 1:13 pm
A real simplistic explanaion. Basically, they are saying Wagner (for example) was a great fielding ss. Great fielding ss's shouldn't make 58 errors, and if Wagner played in a different era, he would not have made 58 errors. They are saying these errors are a condition of the time, not a result of the player's ability. So they decided to "normalize" errors from deal ball players. They looked at some pool of ss's over time (example...post 1950 ss's), and decided that an average fielding ss from this pool would make for example 25 errors in a season, and a great defensive ss, would make only 18. So then they take Wagner, and make him an e18 (or e20 or 22 depending on how MUCH they want to normalize him). The card may still say e58, but the actual probability of an error will be in line with e18.