You can't do that, Ernie never played 2nd base. Look at 2nd baseman stats and you will see Sandberg was one of the best.
What does that have to do with his batting ability? Is there something magic about the area between first and second base that sucks your hitting powers away? Rogers Hornsby played 2B, and he had 500 more RBIs than Ryno, with 200 fewer at-bats.