Hi guys. I'v got a question regarding the pretty commonly used stat OPS+. On baseball reference, it seems to me that the OPS + number that is given for players is their percentage above average for ALL of MLB. What I am looking for is OPS + for each position.

As you well know, a 1st basemen with an OPS + of 105 is not nearly as valuable as a catcher with and identical reading. Basically, what I'm looking for is that OSP + adjusted for a players main position. Any insight at all would be greatly appreciated. Thanks