Part of Marvin Jones Jr.'s offseason was spent in North Carolina working out with legendary receiver Randy Moss.

One of the big things Jones and Moss worked on in those sessions was how to "be friendly" to the quarterback, and really focus on getting Jones to come back strong to the football on in-breaking routes. This helps create separation for quarterback Matthew Stafford to complete the pass, and give Jones more room to run after the catch.

It's something Jones has taken to the Allen Park practice field the first two days of training camp in both one-on-one and team drills.

"What (Randy and I) did was went in and analyzed some of my in-breaking routes and stuff and had I done what I'm doing now, I'm being really focused in.

"When you get into the flow of the game, you're so ready to catch the ball, some of the time, you don't think about stuff like that. It's ingrained in my head now."

Jones said it was the No. 1 focus of their workouts in North Carolina after watching his film from last year.

"It's definitely going to help me a lot," Jones said. "It's definitely going to help Stafford a lot. Instead of catching the 18-yard pass, add the 50-yard run and score. I've been working on it and it's been good."

Jones caught 55 passes last season for 930 yards and four touchdowns, but 36 of those catches, 651 yards and all four touchdowns came during the first half of the season.

This season, Jones is hoping the work he put in with Moss this offseason, along with the lower-body strength he added, will allow him to be more explosive, make more plays after the catch and overall be a more consistent threat through the entire season.

"I think guys are running routes a little bit better," head coach Jim Caldwell said after practice Monday. "I think what you find with guys that have been around, like Marvin, is they find little things to try and improve upon every single year and I know that's a focal point for him and I think you've seen the couple days that we've been out here that he looks pretty good."

HIGH PRAISE

The Lions and veteran safety Glover Quin agreed on a two-year extension that was finalized right before practice Sunday that will keep Quin in Detroit through the 2019 season.

Not only has Quin been one of Detroit's best defenders over the last four years, but he's become one of the biggest leaders. It's for both reasons that Lions general manager Bob Quinn made signing Quin a priority of his.

"We're really excited that we were able to get the extension with Glover," Quinn told WJR Monday morning. "He made it clear to us he wanted to be here and he felt like this team and this organization is heading in the right direction.

"I couldn't be happier because Glover really exemplifies everything that I believe in in terms of a player on the field, a player off the field, what he does in the meeting rooms and how he takes care of his body. I want the young guys on our team to look up to him and I'm glad that he's going to be here for the next few seasons."

IMPRESSING THE VET

The question for Golden Tate Monday was simple. Has anyone stood out and impressed him through the first two days of camp?

Tate's answer might surprise some people.

"I say Dontez (Ford)," Tate said. "I think it's (No.) 83. That guy is executing. He's got great hands. He has great vision. He understands the game. He's been playing fast. I love what he's doing. He keeps his mouth shut and just handles business and that's what I like to see from our young guys."

PRACTICE REPORT

Players still on PUP: DE Ziggy Ansah, DE Armonty Bryant, S Don Carey, T Taylor Decker, T Corey Robinson and DE Jeremiah Valoaga

Players still on NFI: P Sam Martin

Tackle Greg Robinson didn't participate in any team drills for a second straight practice. Storm Norton took some first-team reps at left tackle in team drills.

Also not practicing Monday were: Tight end Eric Ebron, linebacker Nick Bellore and defensive tackle Bruce Gaston. Guard T.J. Lang didn't take part in team drills as the Lions slowly work him back from offseason hip surgery.