JACKSONVILLE, Fla. - Following a four-week absence due to a suspension, Jaguars cornerback Aaron Colvin stood by his locker and smiled, excited to be back with his teammates.

Colvin was punished for violating the NFL's policy on performance enhancing drugs. Missing a quarter of the season was tough for Colvin, especially as the Jaguars stumbled to an 0-3 start.

Watching from afar, Colvin was forced to endure his team's struggles while not being able to solve any problems.

"It was tough just because I know I could add another element to this defense," Colvin said.

"But at the same time, it's cool just see guys playing well in the secondary, just going out and doing what we did in camp and OTAs. So to see it translate, it was a good feeling as well."

Colvin was just an observer, a role he was uncomfortable with. However, he did get to see a lot of his younger teammates shine at times. Colvin enjoyed watching those moments from his home.

"When those guys made a play, I felt like I was making a play, so I'm in the house jumping around just like they were on the field," Colvin said.

"Just to see those guys get the opportunity and seize the opportunity, that's what we all want, that's what we play for."

Colvin is once again in the fold. He started 15 games last season and led all NFL defensive backs with four sacks. A talented blitzer and a versatile defensive back, Colvin has a lot to offer the Jaguars in the depth department.

The third-year player knew that he'd need to be ready to go from the moment he returned this week. That's why he focused on staying in shape during his suspension.

"I've been working my [butt] off," Colvin said.

"Just grinding, just constantly thinking about the ways I could come back and help this defense, help this team. Just trying to stay mentally strong, mentally fit so whenever I get back in, it'll be a smooth transition."

The consistent individual training has helped Colvin stay in game shape. Jaguars head coach Gus Bradley has been happy with the same sample size of work that Colvin has done since his return.

"We had a couple team sessions," Bradley said on Monday.

"Just to see him run around and see guys run around. Very crisp, very fast practice. Couple days off for our players was good.”

Bradley said he expects Colvin to be ready for the Week 6 matchup against the Chicago Bears. Colvin will hope to make an immediate impact for a defensive back group that only has one interception through four games.

Follow Mike Kaye on Twitter at @Mike_E_Kaye.