Every NFL season is full of breakout rookies, players for whom everything seems to come naturally.
Linebackers stack up with the league leaders in tackles, running backs roll up stunning four-digit yardage totals, quarterbacks throw shockingly few interceptions and offensive linemen block like seasoned veterans.
Every season also has its share of sophomore slumps.
Not every rookie who takes the league by storm is destined for the Hall of Fame; plenty of first-year players for whom lightning strikes never manage to catch that lightning in a bottle.
Though every football fan wants to root for kids who splash into the league and show all of the veterans how it's done, many hot rookies never repeat that level of performance.
Whether an actual decline in performance, fans and media being more honest about a player's shortcomings or just a sagging of statistical production, sophomore slumps do happen—and here are the players who'll be afflicted.
All statistics sourced from Pro Football Focus, except where noted. A subscription may be required.