BobbyLayne
Footballguy
@JoeyIckes
In honor of my friends who work in higher ed. I feel its time for a full refresher on the "Running backs Don't Matter 101" course as teams ready for their next big exam next week.
The data is overwhelming.
The studies on the running game go back to as early as 2011 when Brian Burke clarified just how inefficient running the ball was compared to passing.
Then in 2014 Dr. Ed Feng looked at 10 years of data that showed that rushing efficiency contributed to only ~4.4% of the variance in wins, vs the passing game contributing ~62%
Around 2017-2018 the data really cranked up on RBs themselves.
Josh Hermsmeyer looked at 10 years of rushing data, and found that two factors accounted for 96%(!) of rushing gains...
Those two factors? Field position, and # of defenders in the box...
Then Eric and George from PFF added to that study, finding that in addition to Josh's two factors, the actual run concept on a play moves the needle in rushing EPA more than the quality (determined by PFF grade) of the actual ball carrier.
Add that to the study by Ben Baldwin showing that RBs drafted in the top-20 are no better than the league average on a yards per carry basis.
There's also a nugget in here about RBs having the highest 1st round bust rate of all offensive positions
Since we know with these studies (and others) that running backs have very little influence on the success of a running game, and that running game success has little impact on winning games, the argument moves to the passing game.
Does a RB matter if he can be a pass catcher?
Well, in this study, Eric Eager (again) shows that passes thrown to RBs are the less efficient, less valuable, and less stable year over year, than targets to any other position.
Ben Baldwin confirmed that study in this one, where his data showed that targets to RBs have about 1/4 of the EPA per play of targets to TE, and even less vs targets to WR, and a lower success rate (positive EPA) than targets to TE or WRs.
The next question would be, what if a RB can line up as a wide receiver or in the slot on some plays.
Does that change the equation? Back to Eric and George at PFF... RBs lined up in the slot were far less efficient than WRs and TEs lined up in the slot.
So if the running game itself doesn't help you win, the RB doesn't impact the running game, and regularly throwing to a RB is a losing proposition, maybe there are secondary benefits?
Maybe having a good RB & a good running game helps the play action game? Well our friend Ben found that
"teams don't need to run often -- or run well -- to set up play-action. Play-action works for teams that run frequently, infrequently, well, or poorly"
Ok so then maybe a good running back and a good running game keeps the defense rested?
Well FBO did the work & found that "the main - and perhaps only - channel through which an offense can help a defense on a per-drive basis is through field position."
So in review of our review...
You just can't legitimately justify the idea of spending premium (picks or $$) on the running back position, with any quantifiable measures.
In honor of my friends who work in higher ed. I feel its time for a full refresher on the "Running backs Don't Matter 101" course as teams ready for their next big exam next week.
The data is overwhelming.
The studies on the running game go back to as early as 2011 when Brian Burke clarified just how inefficient running the ball was compared to passing.
NFL offense: Running for three yards is like going backwards.
Then in 2014 Dr. Ed Feng looked at 10 years of data that showed that rushing efficiency contributed to only ~4.4% of the variance in wins, vs the passing game contributing ~62%
How passing and rushing affect winning in the NFL
Around 2017-2018 the data really cranked up on RBs themselves.
Josh Hermsmeyer looked at 10 years of rushing data, and found that two factors accounted for 96%(!) of rushing gains...
Those two factors? Field position, and # of defenders in the box...
FiveThirtyEight: The Secret To The Rams’ Blocking Success Isn’t The Linemen.
Then Eric and George from PFF added to that study, finding that in addition to Josh's two factors, the actual run concept on a play moves the needle in rushing EPA more than the quality (determined by PFF grade) of the actual ball carrier.
Are NFL running backs easily replaceable: the story of the 2018 NFL season
Add that to the study by Ben Baldwin showing that RBs drafted in the top-20 are no better than the league average on a yards per carry basis.
There's also a nugget in here about RBs having the highest 1st round bust rate of all offensive positions
Spending a top-20 pick on a RB is one of the worst decisions a team can make
Since we know with these studies (and others) that running backs have very little influence on the success of a running game, and that running game success has little impact on winning games, the argument moves to the passing game.
Does a RB matter if he can be a pass catcher?
Well, in this study, Eric Eager (again) shows that passes thrown to RBs are the less efficient, less valuable, and less stable year over year, than targets to any other position.
Examining the value of receiver and coverage positions in today's NFL
Ben Baldwin confirmed that study in this one, where his data showed that targets to RBs have about 1/4 of the EPA per play of targets to TE, and even less vs targets to WR, and a lower success rate (positive EPA) than targets to TE or WRs.
Throwing to running backs: The latest NFL craze that doesn’t make any sense
The next question would be, what if a RB can line up as a wide receiver or in the slot on some plays.
Does that change the equation? Back to Eric and George at PFF... RBs lined up in the slot were far less efficient than WRs and TEs lined up in the slot.
What's the true value of a slot weapon in today's NFL market
So if the running game itself doesn't help you win, the RB doesn't impact the running game, and regularly throwing to a RB is a losing proposition, maybe there are secondary benefits?
Maybe having a good RB & a good running game helps the play action game? Well our friend Ben found that
"teams don't need to run often -- or run well -- to set up play-action. Play-action works for teams that run frequently, infrequently, well, or poorly"
Further Research on Play-Action Passing
Ok so then maybe a good running back and a good running game keeps the defense rested?
Well FBO did the work & found that "the main - and perhaps only - channel through which an offense can help a defense on a per-drive basis is through field position."
Defense and Rest Time
So in review of our review...
- Running backs don't help the running game
- they're inherently inefficient in the passing game compared to WR's and TEs
- They don't improve play action effectiveness
- they don't help your defense
- drafting RBs high is not "safer" than other positions
- high draft position RBs does not correlate to better production from the RB position
You just can't legitimately justify the idea of spending premium (picks or $$) on the running back position, with any quantifiable measures.