According to ESPN NFL Draft Insider Mike Sando, longtime coach and television commentator Jon Gruden will be "shocked" if Christian Hackenberg is not a first-round NFL Draft pick.

The former Penn State quarterback spent time taping "Gruden Camp" this spring, and the episode featuring the former coach and Lions' QB will air for the first time on Tuesday night at 8:30 p.m.

Sando was on hand for each taping with Gruden (he sat down to film segments with seven different draft-eligible quarterbacks). The show featured film analysis and some on-field work from ESPN's Wide World of Sports Complex in Orlando, Fla., and Sando was keeping track of Gruden's thoughts.

"The biggest surprise to me on Hackenberg is that no one is really talking about him in the first round," Gruden said, according to Sando. "This was the No. 1 prospect in the nation a few years ago and someone who showed during his freshman year he could produce at a high level in a true NFL-style offense. What he showed during that first year at Penn State -- before the coaching change, before the system change, before all the things that derailed him -- would be enough for me to take this guy early.

"This man can run a 4.7-second 40, he is tough as hell and he works relentlessly. He just has to get in the right system with the right people and refocus on the small details."

Draft projections for Hackenberg have bounced around tremendously since he was the Big Ten freshman of the year in 2013 under now Houston Texans head coach Bill O'Brien. It's one of the reasons Gruden sees Hackenberg as one of the draft's biggest curiosities.

"He's one of the big mysteries of this year's crop," Gruden said. "Highly-touted and we know the production he had as a freshman under Coach (Bill) O'Brien. The offensive change and losing Allen Robinson didn't help him, but he's got prototype size and he's got some traits people are looking for."

The Washington Post reports the former Lion is visiting with the Washington Redskins on Tuesday, and Eagles' coach Doug Pederson sounded off on the quarterback on Monday during an interview with The Press of Atlantic City.

"I was pleasantly surprised [with Hackenberg]," Pederson said. "I had never met him before, never talked to him before, but I had a chance to go out there and visit with him.

"I loved his demeanor as a quarterback. He's got all the physical tools, got a great arm, good mobility."

How to watch Christian Hackenberg on "Gruden Camp":

When: 8:30 p.m., Tuesday

Where on TV: ESPN (channel finder)

Where online: WatchESPN (cable subscription may be required)

Replays: According to Penn State, replays of the show will air as follows:

Tuesday, April 19 at 8:30 p.m. - ESPN

Wednesday, April 20 at 9 p.m. - ESPN2

Thursday, April 21 at 11 p.m. - ESPNU

Friday, April 22 at 2 a.m. - ESPN2

Saturday, April 23 at 8 a.m. - ESPN2

Sunday, April 24 at 6:30 p.m. - ESPNU

Sunday, April 24 at 8:30 p.m. - ESPN2

Tuesday, April 26 at 4:30 p.m. - ESPNU

Thursday, April 28 at 3:30 a.m. - ESPNU

Friday, April 28 at 4:30 p.m. - ESPNU

Saturday, April 30 at 11:30 a.m. - ESPNU

Saturday, April 30 at 10:30 p.m. - ESPN2