]I say forget stats and formulas and all that nonsense. At the end of the day, you either win or you lose. and when you ignore the stats and say, i dont know, play miguel cairo every day, you tend to lose more often. ]The other stuff, of which OPS is most crucial, helps you understand how W-L records and RS records are achieved, but they're more fallible than the bottom line numbers are. but the W/L record don't tell you anything about what you are missing. if you are 81-81 what does that tell you? if on the other hand you scored 650 runs and allowed 635 it tells you that you need some help scoring runs, not preventing them. but it still hasn't told you why you arent scoring runs. so you take a look and see that while your 3, 4, and 5 hitters all have respectable SLG% they have few RBIs, so you look at your top 2 and notice that they are getting on base at a combined rate of 31%! and now you've (likely) found your problem, and if you're smart you'll go out and address that instead of replacing perfectly good pitchers who have bad W-L records through no fault of their own but through horrible run support. my point is you need to go deeper to understand a team, here is another example: halfway through the season you have a team in first place, at 44-37 that has scored 50 less runs than it has allowed. the team in second, 42-39, has scored 50 more runs than it has allowed. who do you expect to win that division?