Why? Well if the difference between the hitters' OPS is .040, and OPS+ shows that the lower hitter is below average, whereas the higher hitter is "decently above" average, it would appear that something is either incorrect, or at least skewed. I actually like OPS+, but this seems a little off to me. The difference between Walker and Grudz last season was .088 (300 OBP vs 388, for example) and it's significant enough. Walker's OPS+ was 115, Grudz was at 92. Looks right in line to me. Side note: OPS+ adjusts for both the league and the park the player plays in. OK then there was bad information given. Thanks. Edit: and I forgot Grudz is in the AL this year