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jefferey13 wrote:I just looked around for a second, I didn't delve in too deep into how the ratings are calculated, but here is an ESPN article for basketball that talks about how they calculate PR. The same ideas should apply to baseball.
http://sports.espn.go.com/fantasy/baske ... arater1101
Fenris-77 wrote:Quick and dirty is fine, but it needs a smidge of context too. For example, right now I'd take Jackson over Rios regardless of what the stats say because Jackson is in such a sweet spot hitting lead off in front of the Bash Brothers v2.0. Rios is a solid bounce back candidate this year, but I'm not rostering him over Jackson at this point.
From a stats standpoint I think you'd better off adjusting n for each separate stat, rather than lumping them into two groups like you have. Site like BBM that value various stats in order to rank players are mostly using [urlhttp://statistics-help-for-students.com/What_are_Z_scores.htm]Z scores[/url]. That's not so quick and dirty of course. The problem with your model is that HRs and SBs aren't created equal. HRs are pretty directly tied to another scoring cat (RBIs) while SB exist in more of a vacuum. Well, not exactly since Runs can be linked to SB opportunities, but that's another matter. The point here is that you can find guys who's sole skill is padding your SB totals (Rajai Davis anyone?) while you don't find HR guys like that at all.
I'm not sure I agree with your methodology in general, but I'll play along. I think I'd rather do something like this: (Run + 2(SB)) + (RBI + 3(HR)) to account for my valuing HRs a little more than SBs in a straight player ranking. Although that still stinks a little because I'm still picking multipliers at random.
Another way to go about it would be to add HRs and SBs and then multiply by OPS. That's not as directly tied to RBI and Run totals as your method, but it still takes into account the ability to get on base and hit when it matters.
Rios (16+20)*.711 = 25.6
Radburn (15+2)*.742 = 12.6
Jackson (8+23)*.674 = 21.6
Boesch (17+7)*.765 = 18.4
Interestingly that ranks them the same as your system, but without having to pick an n score at more or less random. This has some of the same conceptual issues as I have with your original system of course, but in either case a little common sense to finish the process off solves a lot of problems.
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