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Arbiter · 03-16-2002, 02:54 PM

[quote]Originally posted by Ankit:
<strong>

If it's essentially the same, then why are my NL outfielders completely different in the OPS and RC27 lineups. There are a total of 4 changes among the 16 spots, that 25%, obviously there is a difference. Speed and base running skills do make a difference in the game and its not minimal or insignificant. The lineups above are only for the highest at each position, what if one had to make a decision to choose someone who is middle of the pack OPS in terms of OPS but can steal bases as opposed to some one who is a little better in the OPS department? OPS is good, but RC27 might be a little better and if it is, it will help people make better decisions.</strong><hr></blockquote>

Well, people have been comparing RC/27 and OPS since at least the late 1980's, so you might find it useful to hit the books before replicating what's been done over and over and over again.

If you play around with the RC/27 formula, you'll notice that RC depends very little on stolen bases and caught stealing, unless a guy both (a) attempts a lot of stolen bases, and (b) has a success percentage that's either unusually high or low. RC/27 does *not* capture any other differences in speed or baserunning ability across players; it is still an open topic just how many runs a guy can add or delete with his non-basestealing baserunning, but most of the data I've seen suggest this would be no more than 5 runs a year.

Finally, OPS isn't even the best OPSlike stat there is; 1.2*OBP + SLG is better. OPS is just more convenient.

I'm not trying to spoil your voyage of discovery, but this is all *old* stuff at this point. What you're doing is essentially trying to pull a signal out of noise where there is no signal.

03-16-2002, 02:54 PM	#8
Arbiter Minors (Double A) Join Date: Feb 2002 Location: College Station TX Posts: 127	[quote]Originally posted by Ankit: <strong> If it's essentially the same, then why are my NL outfielders completely different in the OPS and RC27 lineups. There are a total of 4 changes among the 16 spots, that 25%, obviously there is a difference. Speed and base running skills do make a difference in the game and its not minimal or insignificant. The lineups above are only for the highest at each position, what if one had to make a decision to choose someone who is middle of the pack OPS in terms of OPS but can steal bases as opposed to some one who is a little better in the OPS department? OPS is good, but RC27 might be a little better and if it is, it will help people make better decisions.</strong><hr></blockquote> Well, people have been comparing RC/27 and OPS since at least the late 1980's, so you might find it useful to hit the books before replicating what's been done over and over and over again. If you play around with the RC/27 formula, you'll notice that RC depends very little on stolen bases and caught stealing, unless a guy both (a) attempts a lot of stolen bases, and (b) has a success percentage that's either unusually high or low. RC/27 does not capture any other differences in speed or baserunning ability across players; it is still an open topic just how many runs a guy can add or delete with his non-basestealing baserunning, but most of the data I've seen suggest this would be no more than 5 runs a year. Finally, OPS isn't even the best OPSlike stat there is; 1.2OBP + SLG is better. OPS is just more convenient. I'm not trying to spoil your voyage of discovery, but this is all old* stuff at this point. What you're doing is essentially trying to pull a signal out of noise where there is no signal.