If there was one play that summarized Denard Robinson’s star-crossed rookie season last year, it occurred on Dec. 15 when he ripped off a 24-yard run against the Buffalo Bills.
He was at the 1-yard line ready to score. Then safety Aaron Williams caught Robinson from behind and knocked the ball out of his hands and out of the end zone for a touchback.

The Jaguars got no points on that drive and lost 27-20.

Robinson’s struggles last year showed how difficult it can be to switch positions while trying to make the transition from college to the NFL.

Robinson, who as a sophomore at Michigan became the only player in NCAA history to pass and run for more than 1,500 yards in a season, didn’t have a position in the NFL. He ran the ball, played some wide receiver, some Wildcat at quarterback, some kick returns and special teams work.

Robinson never got enough reps at one position to get in a groove. He played just 52 snaps all year and lost fumbles three times in games.

Now, Robinson’s role is more clearly defined. He plays one position.

“He understands he is a running back,’’ said Jaguars coach Gus Bradley.

Robinson has embraced his new position and bulked up from about 197 to 212 pounds when he returned this week for the start of offseason conditioning drills.

The Jaguars won’t be able to look at him in practice until organized team activities start next month, but Bradley likes what he’s seen of Robinson so far.