More than a decade ago, RotoViz changed how the NFL saw the intersection of age and production through metrics like the Phenom Index and breakout age. Back in 2015 Jon Moore introduced the Phenom Index, a revolutionary way to measure a college wide receiver’s age-adjusted production. He continued to refine it over the years to develop a metric that has identified some of the top fantasy WRs in recent memory. The results of that analysis have been striking.

• In 2015, Jon recommended fantasy drafters buy the hype on Amari Cooper while avoiding early-round busts like Nelson Agholor. Stefon Diggs was also one of the top-ranked players in 2015’s Phenom Index.
• 2016’s iteration picked out Tyler Boyd as a potential target, ranking him ahead of first-round picks Laquon Treadwell and Corey Coleman, and well ahead of Josh Doctson.
• The 2017 version was bullish on JuJu Smith-Schuster and Curtis Samuel, ranking both ahead of early top-10 picks Corey Davis and John Ross.
• In 2018, the Phenom Index picked out D.J. Moore as the top WR while urging caution on numerous second-round busts, including Dante Pettis, Anthony Miller, and James Washington.
• In 2019, Pat Kerrane and Cort Smith joined up to tabulate the results, and although Phenom Index darling N’Keal Harry fell flat, it did pick out major hits in A.J. Brown and DK Metcalf.

The Phenom Index took a break after 2019, but the importance of age-adjusted production has not waned. We can also deploy additional metrics to sharpen the analysis. Receiving yards per team attempt (YPTA), which you can find in the Box Score Scout, enhances the Phenom Index.

The image below shows the correlations between three different versions of the Phenom Index and a few of our favorite WR performance metrics in a player’s first two years in the NFL.

All versions of the Phenom Index show a fairly strong relationship with PPR and receiving expected points (relative to the strength of any college metrics), but YPTA gets the slight edge.

Find even more rookie content in the 2026 RotoViz Rookie Guide! Volume 2 is out now, with over 90 player profiles, advanced stats, player comps, and more!

The 2026 Wide Receiver Class

We can use the components of the Phenom Index to visualize the upcoming WR class in a useful way. I’ll highlight some of the standouts below. Scroll to the bottom of the article for the full dataset.