I have liked the discussion the past couple of days in this thread. The posts following my long one with data, to me, have validated the 2RB requirement as being "okay" and not some demon that needs to be killed off. Sure, starting 1RB with other options might be "more than okay" but the topic of 2RB being bad has not been there in this thread.
I will reassert that if there are leagues with 14+ teams, 1RB is ideal. And, few reasons to get away from 2RB if in a 10-team league.
In the end, I think it all depends upon how you feel about PPR. Earlier, you asked to “show the flaw” in a specific 2RB system and I think the implicit answer to that request is: PPR.
PPR is
intrinsically flawed and
intrinsically corrupting. PPR was designed to artificially inflate the value of one subset of players (WR/TEs) in order to offset the already artificially inflated value of another subset of players (RBs)—all at the cost of artificially depressing the value of the most important subset of players (QBs). We don’t have points-per-completion for QBs. We don’t have points-per-carry for RBs. We don’t have points-per-kickoff for kickers.
If someone finds PPR acceptable or preferable, then there is nothing wrong with the 2RB system. (Other than that it absurdly and unrealistically depresses the relative value of QBs.) If, on the other hand, someone believes PPR to be the most mind-numbingly foolish, artificial, and corrupting innovation in this great game, one’s feelings about the 2RB system are quite different.
Wow, I'm excited this thread has been revived. Lots of awesome discussion going on. Backside, I've enjoyed your comments the most, because I think it reflects an accurate understanding of the evolution of Fantasy Football. I much prefer taking away the 2RB system because it was an artificial construct to begin with (i.e. many teams simply do not feature 2 RB's. Consider Washington, Minnesota, Tampa Bay, etc.) to messing around w/ scoring rules to de-value the RB position. So forcing it is a bit silly IMO, and many people agree, which is why this thread is getting such mileage.
However, that being said, the PPR bonus may not be quite as arbitrary or artificial as you suspect, Backside. I've done some pretty extensive research on the Estimated Points Added value of a rushing attempt, a reception, etc. Turns out that a WR who catches 5 balls for 100 yards contributes less on average to his team's success than a WR who catches 10 balls for 100 yards if both have the same number of targets. The reason is, the one who catches 10 balls likely earned more first downs for his team, and ultimately, first downs is what moves you down the field and gets you points. In the above example, say I'm at my own 20 yard line. I have a RB who runs for 5 yards on average, but is known to get 3-yard gains quite often (RB's have a right-skewed distribution in yards gained meaning that they might average 5 yards per game, but because one of those was a 30-yard breakout, the median run was closer to 3 yards). I'm going to run 2 run plays and 3 pass plays, targeting the same WR on all 3 pass plays, and either get 3ydRun/20yardPass/Incomp/3ydRun/Incomp or I'm going to get 3ydRun/8ydPass/Incomp/3ydRun/12ydPass. In the first scenario, I have a WR who gets 1 catch for 20 yards on 3 targets, but I end up only reaching my own 46 and punting on 4th and 7. In the second scenario, I have a WR who gets 2 catches for 20 yards on 3 targets, and because those two each earned me first downs, I have a 1st and 10 at my own 46 instead of punting there. MAJOR value added.
While the above situation is a bit contrived, something like this is often repeated enough to make the Estimated-Points-Added value of a reception about 0.6 points on average (*
while holding yards, TD's, fumbles, and Targets constant*). Specifically, my data shows and average of:
0.490 pts per reception for RB's (+/- 0.145 w/ standard error)
0.768 pts per reception for WR's (+/- 0.083 w/ standard error)
0.549 pts per reception for TE's (+/- 0.158 w/ standard error)
The reason we see a higher value on receptions for WR's is that they average more yards per catch than either RB's or TE's, and thus, a higher proportion of their catches earn first downs, which like I said, is ultimately what gives value. What this means is that if you have two WR's who have a 100-yard game on equal targets, the one who has 2 more catches than the other will have, on average, earned 1.5 more points for his team. When looking at RB's and TE's, it will mean he on average scored 1 more point. It's worth noting, however, that if you do not hold targets constant (and most fantasy scoring systems do not account for targets) but only hold yards, TD's, and fumbles constant, a reception is worth, on average, -0.4 points. This is because more receptions for a set amount of yards, usually means more targets, and more targets for the same amount of yards generally means less efficiency (more incompletions and drops, which are "negative plays"). So if your system does not include a value for targets, maybe you should have negative PPR ;-)
But I include targets in my scoring (at -1 pt per target, which I know is controversial, but I stand by it for now), and for this reason, I prefer a system that gives 0.5 pts PPR combined with starting only 1 RB. In particular I like:
1 QB
1 RB
2 WR
1 TE
2 RB/WR/TE Flex
because I think the options this system give most resembles what teams will likely have for "Feature players". I don't like options where you can start zero at a position. People here have reasoned that starting zero is legitimate because many formations include zero RB's or zero WR's, etc. Though this is true, Fantasy Football is not a system where you switch up formations in a single game; you go with one formation for a whole game. And over the course of a season (and usually, even over the course of a game), no NFL team will be in a position where they have NO feature RB or feature WR or feature TE. Every team, by season's end, will have at the very minimum 1 feature RB, two feature WR's, 1 feature TE, and two other feature players (most commonly 1 RB and 1 WR, but often a number of other combinations). That's why I like starting 7, and that's why I like the above format.
But I still like 0.5 PPR, not because I need to artificially inflate my WR and TE positions to account for the scarcity of RB's in my league because I require 2 to start, but because the data shows that players who catch more balls, at a fixed targets and yardage level, are still more valuable to a team than players who catch fewer balls.