Making the right moves in NFL free agency can have significant impact on upgrading a team's defense.Take the Bengals, who splurged on defensive end Trey Hendrickson and others the past two offseasons. They filled enough big holes to emerge as AFC champions in 2021.Although some of the best unrestricted defensive players on the 2022 won't go anywhere because they are valuable enough to re-signed by their current teams, more will be too expensive to retain. That should flood the market with several key pa s rushers, run stoppers and cover men.Here's a look at the top available players on that side of the ball acro s positions:MORE: 1. J.C. Jackson, CB, Patriots (age: 28)Jackson was tremendous in coverage taking over as their No. 1 corner. He had eight interceptions and led the league with 23 pa s breakups. He's iffy to come back to New England after the team parted ways with Stephon Gilmore and Terrence Ross Jersey Jackson may need to find his big money elsewhere. Projected landing spot: Patriots2. Von Miller, EDGE, Rams (age: 32)Miller remained effective in producing 9.5 sacks in 15 combined regular-season games with Denver and Los Angeles. He's slowed down a bit from his prime but can still be a valuable part of any 3-4 defensive scheme. Projected landing spot: Rams3. Chandler Jones, EDGE, Cardinals (age: 31)Jones rebounded to pick up where he left off after a 2020 season lost to a biceps injury, recording 10.5 sacks in 15 games. He's consistent in getting to the QB and like Miller, he has one more big-money run left in him. Projected landing spot: Colts4. Je sie Bates III, S, Bengals (age: 25) (franchise-tagged)Bates was a second-team All-Pro in 2020. He wasn't as prolific making plays all over the field in 2021, but he's active extra defender for run support and still has strong ballhawking skills. He will be sticking with the Bengals, who slapped the franchise tag on their star safety.5. Marcus Williams, S, Saints (age: 25)Williams has been steady, durable and well-rounded for New Orleans since some struggles as a younger player. He's always got a nose for the ball in coverage and had his best season vs. the run in 2021. Projected landing spot: Commanders (Getty Images) 6. Stephon Gilmore, CB, Panthers (age: 31)Gilmore was pretty strong in coverage during his half season in Wes Iwundu Jersey Carolina after being dealt from New England. He's not fading too much given his age but is still more of a short-term playmaker for interested teams. Projected landing spot: Chargers7. Carton Davis, CB, Buccaneers (age: 25)Davis mi sed seven games with injuries in 2021 but when on the field, he showed the shutdown promise and ball skills from his breakout 2020 season that was integral to Tampa Bay winning the Super Bowl. Projected landing spot: Jaguars8. Akiem Hicks, DT, Bears (age: 32)Hicks' production inside against run and pa s looked similar between 2020 and 2021, putting up the same 3.5 sacks in six fewer games of healthy action. His defied his age to be a strong plug-and-play. Projected landing spot: Seahawks9. Emmanuel Ogbah, EDGE, Dolphins (age: 28)Ogbah had a few ma sive games in producing a second consecutive season with 9 sacks. He has enjoyed his best play in Miami, including against the Nikola Vucevic Jersey run, and can remain consistent elsewhere. Projected landing spot: Colts10. Harold Landry, EDGE, Titans (age: 25)Landry busted out his fourth season plugging away as a durable grinder for Tenne see with 12 sacks from their 3-4 scheme. He's stayed strong and injury-free which gives him rising appeal as a first-time Pro Bowler. Projected landing spot: Titans11. Jadeveon Clowney, EDGE, Browns (age: 28)Clowney had 9 sacks, matching his output from his final season with the Texans in 2018. He played well off a sensation season from Myles Garrett. He can be effective in his later age remaining in a complementary role, given he's always been a fine run stopper. Projected landing spot: Broncos12. Casey Hayward Jr., CB, Raiders (age: 32)The former Packers and Chargers standout had a rejuvenated season as a top cover corner in Las Vegas. He might be a little slower, but he still uses his smarts well in all of his a signments. Projected landing spot: Raiders13. Randy Gregory, EDGE, Cowboys (age: 29)Gregory was a strong part of Dan Quinn's effective line rotation with six sacks, settling into a Cole Anthony Jersey veteran complementary role while also making some key plays on the ball. Projected landing spot: Cowboys 14. Tyrann Mathieu, CB, Chiefs (age: 29)The ultimate hybrid, the now venerable "Honey Badger" has made two consecutive Pro Bowls with Kansas City by always being around the ball in coverage and run support. The Chiefs will do their best to keep the leader of their defense. Projected landing spot: Chiefs15. De'Vondre Campbell, LB, Packers (age: 28)Campbell was a pretty prolific tackler for the Falcons and Cardinals but he really raised his game as a cover man, tackler and effective blitzer, rewarded with his first first-team All-Pro nod in his sixth season. Projected landing spot: Patriots16. Calais Campbell, DT, Ravens (age: 35)Campbell has waned from the dominant force he once was for the Cardinals and Jaguars because of his age, but he can still be a valuable versatile contributor. Projected landing spot: Dolphins17. Melvin Ingram, EDGE, Chiefs (age: 32)Ingram provided a big lift to Kansas City's Dwayne Bacon Jersey defense at midseason, proving he plenty of juice left as a pa s-rusher and backfield disruptor. Projected landing spot: Eagles18. Haason Reddick, EDGE, Panthers (age: 27)Reddick followed up his double-digit sack final in Arizona with 11 more in 16 games while reuniting with college coach Matt Rhule on a one-year deal. He has settled as a quarterback-pursuing specialist. Projected landing spot: Panthers19. Quandre Diggs, S, Seahawks (age: 29)Diggs has been solid coming over from the Lions with two consecutive 5-interception full seasons and is a good leader and clean-up presence for a defense. Projected landing spot: Jets 20. Foyesade Oluokun, LB, Falcons (age: 26)Oluokun led the NFL with 192 combined tackles in 2021 and he also had three interceptions. He's a reliable run defender with some juice in coverage, too. Projected landing spot: Falcons21. B.J. Hill, DT, Bengals (age: 26)The former Giant has proved to be a good interior pa s-rusher to complement their strong ends and should get a boost from his 5.5-sack regular season and playoff performance. Projected landing spot: Bengals22. D.J. Jones, DT, 49ers (age: 27)Jones is a strong gap-clogger against the run to be trusted on early downs but he also brings some inside pa s-rush pop. Projected landing spot: 49ers23. Mar