Under-the-radar NFL free agents who can make an impact in 2019

The defensive end has played just 34 games over the past three years, and he will turn 30 in May. But when healthy, Ansah is a prolific pass rusher. He's posted double-digit sacks in each of the last two seasons when he played at least 14 games. Ansah has 16 sacks in his last 21 games.

The safety isn't the same All-Pro-caliber player he was before tearing an ACL in December 2015, but he's still more than a quality starter. This past season for Houston, Mathieu recorded 89 total tackles, eight pass defenses, 3.0 sacks and two interceptions. Any team that needs a quick fix at safety should look into signing Mathieu to a long-term contract this month.

Roby is better as a nickel cornerback. In his first year as a starter in 2018, he struggled in coverage, recording 12 pass defenses. Roby actually had more pass defenses as a reserve player in 2017. But he can add quality depth to most secondaries around the league.

Ansah and Trey Flowers will garner more attention this free agency period, but Smith is part of the next tier of edge rushers available on the market. He posted a career-best 8.5 sacks and 25 quarterback hits in 2018, which was his first season in which he played 16 games. However, Smith looks to still be better as a pass-rushing specialist. He recorded only 2.5 of his sacks in eight starts last year.

The 29-year-old center is coming off foot surgery, which caused him to miss the final seven games of 2018, but he was a reliable starter prior to that injury. He started every game for the Broncos from 2015-17 and ranked as one of the best centers in the NFL, according to Pro Football Focus. Paradis should garner attention from any team that needs help at center.

The veteran tight end can't seem to find a consistent home, but he continues to be productive. Last season with the Raiders was his best yet, as he posted 68 receptions, 896 yards and six touchdowns on his way to his first Pro Bowl. All of those numbers were career highs. Teams need to be wary that those numbers don't inflate his price too much, but Cook will be a valuable veteran pass catcher wherever he lands next.

The middle linebacker has been an undervalued part of the Eagles defense for a couple of  years. In 12 games during 2018, he posted 91 total tackles, including 5.0 for loss, six quarterback hits and 3.0 sacks. As a three-down linebacker, Hicks is ready to become a team leader in the middle of the defense he plays for in 2019.

After Julian Edleman's Super Bowl performance, Humphries should see his value rise. He's a capable slot receiver who caught 76 passes for 816 yards and five touchdowns last season. He came on strong at the end of last year, posting 49 catches and all of his touchdowns after October. Humphries would be a lethal slot receiver in the right system.

Deemed washed up at the beginning of 2018, Anderson ended the season on the NFC champion Los Angeles Rams and was a major reason why the Rams advanced to the Super Bowl. He rushed for 189 yards and two touchdowns during the playoffs. Anderson's days as a feature back are done, but at only 28 he should find a place as a No. 2 or No. 3 back on a contender.

The former first-round pick never became a consistent starter in Cincinnati, but Dennard is more than capable of playing the nickel cornerback role well. He had 68 total tackles and six pass defenses in 13 games last season. Dennard should see plenty of interest on the open market.

After going No. 11 overall in 2013, Fluker was a castoff from the Chargers and Giants, but he found a home as a starter for the Seahawks. He started 10 games at right guard in Seattle during 2018 and helped the team lead the league in rushing. Teams looking to improve their run blocking should make a run at Fluker this March.

The defensive tackle played just six games last season because of a torn quadriceps, but he was a consistent starter for the Chargers prior to that injury. He recorded 275 total tackles, including 59.0 tackles for loss and 24.0 sacks in 108 games over eight years with the Chargers. Liuget will add an inside pass rush wherever he plays in 2019.

The linebacker will turn 36 in March, so his best days are clearly behind him, but Davis made 12 starts last season and was still a Pro Bowl-caliber player as recently as 2017. Last year he posted 79 total tackles and six pass defenses. Davis is like a fine wine: The best seasons of his career came during his early 30s. With his leadership skills, Davis will be a great addition for any defense even at his age.

It's hard to believe Lynch first retired more than three years ago, but since returning to the NFL with the Raiders, he's rushed for 1,276 yards and 10 touchdowns in 21 games. He's not the same fierce runner he once was, but even while turning 33 in April he will at least be a quality short-yardage back in 2019.

The undrafted cornerback was a cap casualty for the Atlanta Falcons this offseason, but he has plenty to offer as a starter or nickel back. In 16 games, nine of which he started in 2018, Poole posted 74 total tackles, 3.0 sacks and three interceptions. He has 5.0 sacks and four interceptions in 47 career games.

The 29-year-old was a tackling machine in 2017, as he posted 106 total tackles, including 75 solos. But this past season, he had only 42 tackles in 11 contests. He also had just one pass defense and no sacks in 2018. While Marshall is better as a run stopper, he will still be a quality addition to any defense looking for linebacker depth.

Similar to Fluker, Sweezy revitalized his career at least as a run blocker with the Seahawks in 2018 after being a disappointing free agent signing previously. Teams shouldn't overpay, but the soon-to-be 30-year-old might be able to improve a team's running game in 2019.

He will turn 36 this summer, but Grimes continues to be a quality starter. In 2018, he posted 48 total tackles, including 42 solos and six pass defenses. While Grimes didn't have any interceptions in 2018, which should lower his price, he did have at least three interceptions in each of the previous five seasons.

The game has passed him by a little because Peko is a traditional run-stuffing nose tackle; however, any team looking for beef in the middle of its defensive line can sign Peko at a cheap price. He posted 31 total tackles, including 2.0 tackles for loss, and two pass defenses in 2018.