Runs Created suffers from the same problems. SLG uses a scoring system which isn't real-world baseball stats. RC does the same thing, it just uses different weights (more points for singles and triples, less points for doubles and home runs). RC has some other modifiers thrown in so as to weigh other additional statistics that aren't covered by OPS. OBP is a real world system. If the batter touches a base, they get a point. Otherwise they get 0 points. Throw all of the events together and you get the average. When you try to combine a real world system (OBP) with an artificial points-based system (SLG), you are going to have problems matching it all up, particularly when some event (in this case, the hit) is counted in both systems. One way to fix OPS would be to remove hits from the OBP portion of the equation. This would fix OPS, but it would devalue OBP even more in the process, at least if people start only looking at your new version of OPS and continue to ignore OBP as standalone stat. An alternative way to fix the issue would be to re-weigh the SLG statistic by subtracting one for each hitting event and leave OBP alone. Since 1 point is already gained by a hit on the OBP side, on the SLG side a single is then 0 points (as it was already counted in OBP), a double is 1, triple is 2, and HR is 3. A third possible fix would be to do OBP + extra-base-hit%. That would be interesting and it would cover everything without going to a points-based system (though no doubt many would not like the idea of doubles being weighted the same as triples and home runs). I have done the former (and generally liked the results -- try it with Mauer's and Killebrew's MVP years) but I have not tried the latter two. As an aside, both OBP and SLG are important but let's face it not every player can do both -- and teams don't need every player to do both. We should be OK with using OBP and SLG separately to judge the strengths of players. Teams want SLG guys in the middle of the order and OBP guys everywhere else (probably including the bench). Taken that way, there is no doubt that OBP is underrated. OBP and defense should be the bread and butter of a baseball team.