OPS is a good metric for quickly assessing a player's offensive contributions but it's not perfect. It's certainly better than the traditional Batting Average, HR, RBI.

The problem I have with OBP+ISOP is that it overvalues XBH and undervalues OBP. A HR is not worth 4 times as much as a single.

If you want to improve on OPS in a quick calculation, one option is GPA, which is (OBP*1.8+SLG)/4. This has a little higher correlation with runs scored than OPS.

See the leaderboard at http://www.hardballtimes.com/thtstats/m ... mit=Submit

And see more background at

http://www.aarongleeman.com/2003_11_23_ ... chive.html

If you want something really precise you should probably use Equivalent Average or a Linear Weights calculation.

http://www.baseballprospectus.com/stati ... qa2006.php