Yes, the OPS statistic values SLG more than OBP, but that's ok since it should be. SLG, in essence, is more valuable than OBP. A single is more valuable than a walk, a double is more valuable than 2 walks, a triple is more valuable than 3 walks, and a HR is more valuable than 4 walks. Consider this scenario: Player A has 25 triples and 75 K's in 100 PAs, his OPS would be 1.000 (.250 OBP + .750 SLG) Player B has 25 singles and 50 walks and 25 K's in 100 PAs, his OPS would also be 1.000 (.750 OBP + .250 SLG) Which player would you want on your team? I would say player A since all those triples will clear the bags leading to more runs. With an adjustment factor of greater than 1 made to OBP, an adjusted OPS would clearly say player B is better. Therefore, if anything, OPS overvalues OBP.