In 13 games during his rookie season, Jacksonville Jaguars running back Leonard Fournette only managed to average four yards per carry or more in four games. He averaged under three yards per carry in more games—five, to be specific—and his season average ultimately checked in just a hair below four yards, which is routinely seen as a standard baseline for rushing success.
He also had just 57 yards on 21 carries in his first career playoff game against the Buffalo Bills, averaging 2.7 yards per carry for his efforts. For a player who found after his first preseason skirmish that the NFL is “a lot slower” than he expected and “really easy”, his efficiency metrics don’t really back it up.