It’s not a mystery: It’s difficult to break through into the Packers’ offense as a rookie wide receiver.

Davante Adams saw some action as a rookie, catching 38 passes for 446 yards. Randall Cobb caught 25 passes for 375 yards. Jordy Nelson produced 33 catches for 366 yards. The list goes on and on.

It stands to reason, then, that it’ll be tough for the Packers’ three rookie wide receivers – J’Mon Moore, Marquez Valdez-Scantling and Equanimeous St. Brown – to break through and see real, live action in their first season.

With the odds against him, Valdez-Scantling is putting his best foot forward.

According to a report by Michael Cohen of The Athletic, Valdes-Scantling attended a football camp in Tampa before training camp where receivers were taught the X’s and O’s of their sport. With a playbook in hand, Valdes-Scantling went into the camp to learn not just what he does on an individual route on each play, but what the entire offense is doing, what the protections are and who the first, second and third reads are for the quarterback.

Aaron Rodgers is particular, that much is well documented. He wants receivers to run routes a precise way in order to make the offense function to his liking.

Valdes-Scantling must know this, for he’s taking it upon himself to master the fundamental elements of playing receiver that made players like Nelson so good.

“Valdes-Scantling said he wanted to learn the entire Packers’ offense rather than focusing solely on his particular routes,” Cohen wrote. “His goal was to understand the totality of each page in the playbook — from the offensive linemen’s responsibilities to the running backs to the tight ends — before moving to the next entry, and he accomplished this by drawing each play by hand. He’s redrawn the entire playbook three times since the Packers drafted him in April.”

There are rough patches in his future to be sure, but the fifth-round pick from South Florida is a raw height-weight-speed prospect (6-4, 4.37 40-yard dash) with plenty of upside. A refined Valdes-Scantling should make the receiver battle interesting.

It’s been rare that Rodgers has had a stable of receivers who stand several inches over most corners with speed to match. Training camp is still in its infant stages, but we got a glimpse of Valdes-Scantling’s physical prowess when he torched fellow rookie, and first-round pick, Jaire Alexander on fade up the sideline. A bad ball allowed Alexander to make the play, but his speed was on display.

Sometimes the difference between a borderline NFL starter and a great, perennial Pro Bowler is the ability to process physical traits into refined craftsmanship.

Valdes-Scantling spent time in Tampa not only learning the playbook, but heeding the advice of one of the greats: Randy Moss.

According to Valdez-Scantling, Moss wanted to help these young guys out, to share the wealth of knowledge he accrued throughout years in the league.

So what was the takeaway?

“I think it’s the small details,” Valdes-Scantling said, via Cohen. “Everyone can teach a guy how to run a post route: run five steps and run at the upright of the goal post. That’s the basics. But he’s teaching the little details of, ‘OK, when you’re running this route, this is why you run it this way. Or when you have a defender playing right here, this is what you do against that.’ So he’s just teaching the very small details that a lot of guys don’t know about. The only way you ever know those things is if you played football. So he’s teaching the things that he saw when he was playing, and I think that’s what was the most important thing.”

Each day it seems a different rookie makes a splash play or pulls ahead of another. With plenty of ball left to play, who knows how it’ll settle, but the early returns are good, especially for how each player is approaching the game as a professional.