It used to be said that you couldn't fully evaluate a wide receiver until his third season in the NFL.
For years, it was one of the most difficult positions at which to make a smooth transition from college to the pros.
Even Calvin Johnson, arguably the most physically talented receiver of the past decade, hauled in just 48 receptions as a rookie and didn't make his first Pro Bowl until his fourth year in the league.
But that trend has changed dramatically in recent years.
According to Pro-Football-Reference.com, 18 rookies have hauled in at least 50 receptions over the past three seasons, an average of six per year.