- Posts: 2503
- Joined: Thu Aug 23, 2012 5:00 pm
rburgh makes a good point. Strats assignment of something like park metrics verses those used by the sabermetricians is going to influence things a bit. That is one reason I do not like all of the saber stats.
I am not necessarily defending Strat here. But OPS+ is a made up stat. It claims to make adjustments for park effects and other variables. The values assigned to those variables alter the result. If these variable assignments are incorrect then so is the result. And the more variables they put in to it the more margin of error there could be. Here is a fun exercise. Try to find a site that explicitly states how OPS+ is calculated such that you could plug it in to a spreadsheet and validate the results given by the various websites is accurate.
Let's say for example that the margin for error is +- 10%. That means Allen's 1972 value could be as low as 179. And Foster's 1977 value could be as high as 178. Now I just pulled 10% out of the air as an illustration. But hopefully you see my point.
Now I am not saying OPS+ has no meaning or value. I am only saying be careful in treating it as if it was a concrete stat that a simulation engine should target for reproduction. These things get put out there and then get treated as fact. Don't ignore them but don't lose the context of them either.
I am not necessarily defending Strat here. But OPS+ is a made up stat. It claims to make adjustments for park effects and other variables. The values assigned to those variables alter the result. If these variable assignments are incorrect then so is the result. And the more variables they put in to it the more margin of error there could be. Here is a fun exercise. Try to find a site that explicitly states how OPS+ is calculated such that you could plug it in to a spreadsheet and validate the results given by the various websites is accurate.
Let's say for example that the margin for error is +- 10%. That means Allen's 1972 value could be as low as 179. And Foster's 1977 value could be as high as 178. Now I just pulled 10% out of the air as an illustration. But hopefully you see my point.
Now I am not saying OPS+ has no meaning or value. I am only saying be careful in treating it as if it was a concrete stat that a simulation engine should target for reproduction. These things get put out there and then get treated as fact. Don't ignore them but don't lose the context of them either.