Jon Gruden gave Derek Carr a serious vote of confidence as the quarterback of the Las Vegas Raiders on Thursday.

"I really think Derek is a heck of a player and I got a lot of respect for what he has done with some tough circumstances," Gruden said.

"So I'm not going to answer every media rumor out there. I just can't do it. I'm just going to listen to my Sirius Rock n' Roll classic vinyl [station] and keep working. But I love what Derek Carr did, love what he brings to our team and anxious to continue to build around him."

Carr signed a five-year, $125 million contract extension in June of 2017.

The Raiders have been linked to Tom Brady.

Vontaze Burfict is working this offseason to conform his style of play to the NFL's rules after serving a 12-game suspension for a helmet-to-helmet hit.

"Vontaze has spent the entire offseason studying and learning the proper code of conduct for participation in the NFL. He has watched tape, talked with coaches and NFL experts, doing everything he can to conform his passionate play to the rules of the NFL. This is a serious issue not only for Vontaze but all players, and he is serious about doing things the right way and being a leader in playing football the right way," agent Peter Schaffer told NFL Network.

Burfict is set to be an unrestricted free agent next month.

With the new NFL year a little more than a month away (March 18), here is a look at the 10 teams with the most cap space.

The numbers are based on a salary cap of $200 million.

1. Miami Dolphins - $89.3 million

2. Indianapolis Colts - $86.2 million

3. Buffalo Bills - $80.2 million

4. Tampa Bay Buccaneers - $79.9 million

5. Dallas Cowboys - $77.2 million

6. Denver Broncos - $61.9 million

7. New York Giants - $61.9 million

8. Houston Texans - $55.2 million

9. Las Vegas Raiders - $54.9 million

10. Arizona Cardinals - $53.7 million

The Oakland Raiders have signed Jalen Richard to a two-year contract extension.

Richard, 26, has become a favorite of Jon Gruden because of his ability to catch the ball out of the backfield.

He has averaged 5.0 yards per carry in his career with 1,170 yards on 233 attempts with three touchdowns and has caught 160 passes for 1,380 yards and three scores in 64 games.