Should We Retire D/ST Position?

Updated: July 8th 2016

#NoMoreDefST

Where did the D/ST position come from? I understand that, like prop bets, it’s fun to have action on every aspect of a football game, but I believe the D/ST increases the randomness of weekly contests and makes fantasy football a less fun and skillful hobby. I’ve long believed the scoring outputs are too matchup and touchdown dependent, and are often aided by fluke, unpredictable plays. The quality of the defense matters less than it does at any other position. This has been a theory of mine for years, but I wanted to dive into the data and see if my theory was actually true.

There has been a movement to get rid of the kicker position, which has even been adopted by DraftKings and MyFantasyLeague. Why isn’t there much of a push to retire the D/ST position? Let’s examine why there should be #NoMoreDefST.

Weekly Matchups Impact D/ST Outputs More Than Any Other Position

Through analyzing ESPN’s 2015 Points Against Data, I discovered that defenses (D/ST) were affected more dramatically by weekly matchups than any other positions. Defenses facing the Tennessee Titans‘ offense averaged 11.5 fantasy points per game. Cleveland‘s offense was just behind Tennessee at 10.4 fppg. Ranking as the 32nd best matchup, defenses facing the Arizona Cardinals‘ offense averaged only 1.6 fppg. Teams facing the best matchup, Tennessee, scored 719% more points than those facing Arizona, the worst matchup. Looking at that same metric, it’s clear that other positions are far less affected by weekly matchups – QBs 197%, RBs 216%, WRs 196%, and TEs 260%. As unpredictable as the NFL, do we really want our weekly contests being decided by whichever defense is lucky enough to face a team like Tennessee or Cleveland?

How Does The Season Schedule Impact The D/ST Scoring Leaders?

Since we’ve found that weekly matchups matter greatly to fantasy D/STs, I wanted to determine if the frequency of good matchups dramatically impact the season long scoring leaders. To test this theory, I tallied how many top 10 matchups (using the aforementioned ESPN Points Against Data) each of the top 10 and bottom 10 fantasy scoring defenses faced in 2015. Teams that finished in the top 10 in scoring, according to ESPN’s 2015 Scoring Leaders, averaged 5.8 top 10 matchups during the season, while bottom 10 teams averaged only 4.1 top 10 matchups. A difference in nearly 2 top 10 matchups per team appears to have impacted the standings. This isn’t to say the quality of the D/ST doesn’t matter, but to explain that factors outside of their control impact their scoring outputs more than any other position.

Are TDs Too Heavily Weighted For D/STs?

The Philadelphia D/ST scored 7 TDs in 2015, tied for the most of any team. This aided the Eagles D/ST into becoming a defense that warranted consideration from many fantasy owners. On the season, Philadelphia finished 16th after a poor final month. Of the top 23 D/STs in 2015 scoring, no D/ST had more zero or negative point games than Philadelphia. Philadelphia had 5 such games. 7 plays  –Darren Sproles return TDs, a blocked punt, a fumble, and several interceptions caused the Eagles to swing several matchups in 2015. I’d argue that the randomness and unpredictability of these TDs required little preparation and skill from their fantasy owners.

Verdict

Fantasy football has never been more popular than it is right now. Major networks such as ESPN, Yahoo, CBS, and NFL Network now produce weekly shows to help fantasy owners set lineups before kickoff every Sunday. Fantasy football platforms with unique offerings like Reality Sports Online are rapidly growing in popularity. With all of this growth in the industry, the widely accepted standard roster positions and scoring have mostly remained intact. With more resources for preparation and news information available than we have time to read, we should also aim to optimizing the experience on Sundays. Nothing is more frustrating than watching your season end as a defensive lineman runs into the endzone for a TD on a recovered fumble. You saw that coming? Me neither.

Join me in retiring the D/ST position on Twitter (@DaveSanders_RSO) by using the hashtag #NoMoreDefST!


Bio: An avid fan of all things NFL, Dave has been playing fantasy football since 1999.  Though Dave participates in all types of fantasy football including redraft and daily, he prefers keeper and dynasty leagues as talent evaluation and scouting are integral components of each. 

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