What's the soundest strategy to pursue with a first-round pick in a fantasy draft? Looking at the durability of each position, Ian Allan comes up with some unexpected results.

Running backs aren’t as durable as quarterbacks or wide receivers. That’s the risk with taking them in the first round – they’re far more likely to get hurt, and then your fantasy season goes to hell.

That’s the theory, anyway.

Check out this little study.

For this one, I set touchdowns aside. Looked only at yards. For each of these three positions – QB, RB, WR – I took the top 50 players of this century (2000-2013). Looking only at guys who started at least 15-16 games, I took the top 50 in average yards per game.

Then I looked at how those players did the NEXT season. That is, if you have a big stud producer, and a guy who stayed healthy (some of those 15-game starters maybe were rested for Week 17 or whatever), then how did they do the following season?

I set aside guys who didn’t play at all the next year. If a player either retired or blew out his new in July or whatever, I just eliminated him from the get-go. To be eligible, the player had to start at least one game in the following year.

I results, for me, were a little surprising.

I thought the running backs would miss the most games, by far. Instead, they were the most durable.

Of the 50 quarterbacks, five of them missed over half of the season. That’s 10 percent of the group. Another seven missed 3-7 games. The guys who started 14-16 games, I’m going to call them “healthy”.

For the wide receivers, three missed half of the season. Seven missed 7-9 games. So that’s 20 percent of those top receivers missing at least 3 games in the followup seasons.

For the running games, none of them missed half of the season. Only five missed 3-7 games. So only 10 percent missed three-plus games.

Total missed games: Quarterbacks 89, wide receivers 74, running backs 39.

We can also look at the fluctuation of what happened on the field. That is, when a running back averages 100 yards one year, how much does he tend to fall off in the followup season? For this one, I went with per-game production. I didn’t want to penalize the QB and WR positions too much for playing fewer games.

For quarterbacks, the top 50 averaged 287 yards in their big seasons. They decline to 266 yards, on average, the next year. (Again, setting aside injuries). That’s a drop of 7 percent.

For wide receiver, they averaged 92 yards in their big seasons, then dropped to 77 yards. That’s a drop of almost 17 percent – over twice as much.

For running backs, they averaged 97 yards in the superstar seasons, falling to 88 yards in the followup. That’s a drop of 9 percent.

This is just a subset – the top 50 at each position while looking at three two-season blocks (so about the top 4 players each year). But not the results I expected.

I am heading back to the drawing board. May make some shifts in philosophy at the top of my draft board this year.

QUARTERBACKS DECLINING 20 PERCENT
YearPlayerStartYardsDecline
2008Tom Brady17675%
2003Rich Gannon718238%
2003Drew Bledsoe1617934%
2010Brett Favre1319327%
2007Marc Bulger1219926%
2005Daunte Culpepper722324%
2001Elvis Grbac1421722%
2012Philip Rivers1622522%
2002Kurt Warner623622%
WIDE RECEIVERS DECLINING 20 PERCENT
YearPlayerStartYardsDecline
2005Javon Walker12769%
2001Derrick Alexander123757%
2008Chad Ochocinco134254%
2012Larry Fitzgerald165043%
2005Muhsin Muhammad155043%
2005Joe Horn135042%
2004Randy Moss135942%
2007Marvin Harrison54942%
2006Santana Moss145639%
2002David Boston86436%
2008Randy Moss166332%
2011Reggie Wayne166029%
2011Brandon Lloyd156429%
2002Rod Smith166428%
2008Terrell Owens166627%
2004Anquan Boldin96426%
2002Jimmy Smith166425%
2001Isaac Bruce166925%
2008Reggie Wayne167224%
2009Larry Fitzgerald166824%
2003Marvin Harrison158521%
RUNNING BACKS DECLINING 20 PERCENT
YearPlayerStartYardsDecline
2004Jamal Lewis128435%
2004Ahman Green157834%
2010Chris Johnson168532%
2013Adrian Peterson149031%
2007Frank Gore157331%
2006Edgerrin James167228%
2002Curtis Martin166828%
2003Ricky Williams168626%
2004Deuce McAllister147725%
2008LaDainian Tomlinson166925%
2011Chris Johnson166523%
2009Adrian Peterson168621%
2013Alfred Morris168021%
2013Marshawn Lynch167921%

—Ian Allan