Okay, I'll reveal the methodology here.
First, each pair of RBs are essentially even. Here's their tally:
rsh ryd rtd ypc rec ryd ypr rtd Rsh V Rec V Tot V300 1300 12 4.33 20 100 5.00 1 520 8 528300 1075 8 3.58 50 500 10.00 3 255 274 529 200 1000 13 5.00 40 300 7.50 1 530 106 636200 1000 3 5.00 50 450 9.00 1 430 204 634 375 1500 11 4.00 30 275 9.17 1 485 132 617315 1320 11 4.19 30 275 9.17 1 485 132 617 320 1350 8 4.22 30 300 10.00 2 470 167 637250 1150 7 4.60 60 455 7.58 2 470 168 638The three end columns are rushing value, receiving value, and total value. How do I get each?Rushing value - I give 10 yards for each rushing TD. This is controversial, although some think that's too much, most think it's too little. A good explanation can be found
here. So now each RB had their number of rushing yards + 10* their number of rushing TDs. At this point, I have to adjust for the difference in number of carries. I think 3.0 YPC is a very easy barometer to hit -- therefore, each RB gets yards only for their rushing yards over 3.0 YPC. Therefore, RB1 in group 2 was the best. He's got 1130 adjusted rushing yards, and 3.0 YPC * 200 carries = 600. Therefore, he's got 530 adjusted rushing yards above 3.0 --> so he has 530 rushing yards of value. RB1 in group 1 is really close, of course. He had 300 carries, which means he gets credit for all adjusted yards over 900. He had 1300 rushing yards and 12 TDs, so that's 1420 yards --> 520 rushing value.
Does that seem right to you? It feels right to me, but the responses have me curious. It also pits 250-1150 as better than 375-1500 (note that the big carry RB had four more TDs (40 adjusted yards) but only 15 more yards of rushing value). That might seem unfair, but consider that we're talking about 350 rushing yards on just 125 carries -- anybody could do that.
How about receiving? The NFL average adjusted net yards per pass play this past season was 5.11. That means on every pass play, if you hit just 5.11 yards, that's average. I don't want to give receiving RBs too much credit, so while I used a really low baseline for RB ypc (3.0), I'll use average here. So RBs only get points for their yards above that number.
The guy with 50-500-3 had 530 adjusted rushing yards. An average 50 passes would yield 256 yards; therefore, he gets 530-256 = 274 receiving yards in value. Is that fair/right? It also makes the following guys equal -- 30-300 and 60-455. I think most would view the 60-455 guy as better, but in a lot of ways he's adding receiving yards that aren't so valuable. Every reception he has is an opportunity someone else doesn't get, so he should only get credit if he does something good with it.
I then added the two value totals together.
I'm open to suggestions on how to compare RB rushing and receiving numbers. With different numbers of carries, yards, receptions, receiving yards and total TDs, you have to come up with a pretty complicated formula to get just one statistic to use across the board. I'm cautiously comfortable with this metric now, but could use some tweaks. (Fumbles are included, but are irrelevant for this exercise.)