The Seattle Seahawks shocked the world by making the playoffs last season and need to build on that this NFL offseason. The Seahawks' roster is young and up-and-coming, so they don’t need a lot of big moves in the NFL free agency. Still, there are a few more Seahawks free agents the team can sign to round out the squad for next season.

This NFL offseason, the Seahawks took care of their big piece of business, signing Geno Smith to a new contract extension. After that, some big Seahawks free-agent moves came on the defensive side of the ball. The team beefed up the D by bringing in Denver Broncos defensive end Dre’Mont Jones, Green Bay Packers defensive end Jarran Reed, New York Giants safety Julian Love, and Pittsburgh Steelers linebacker Devin Bush.

With the D sufficiently improved, the next steps for Seattle in NFL free agency is to put some final touches on the offense. This means adding depth and veteran leadership to the offensive line as well as a few specialists to the skill position groups.

And with those as the needs as NFL free agency winds down, here are the three best NFL free agents still available to help round out the Seahawks roster.

Isaiah McKenzie, WR, Buffalo Bills

Seattle is obviously good with its top two wide receivers, Tyler Lockett and DK Metcalf. However, after that, it gets a little dicey. Right now, the other players on the Seahawks roster at the position are D'Wayne Eskridge, Dareke Young, Johnson, Easop Winston, and Connor Wedington.

Young and Eskridge are promising young wideouts, but neither is ready to step into the full-time WR3 spot.

The team needs another WR, and Isaiah McKenzie, who the Buffalo Bills just cut, would be a nice fit. McKenzie can play the slot, move around the formation and even line up in the backfield and return kicks.

Those are all things Seattle can use next season in a Seahawks free agent. And McKenzie is a low-risk, high-reward signing. He won’t cost a ton, and even if he doesn’t become a primary pass-catcher, his kick return skills alone will take some pressure off DeeJay Dallas.

Devin Singletary, RB, Buffalo Bills

As long as we have the Seahawks signing former Bills players on the NFL free-agency market, let’s keep it going with former Buffalo running back Devin Singletary.

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The NFC West squad lost Rashaad Penny to the Philadelphia Eagles and Travis Homer to the Chicago Bears in free agency. Now, the team has second-year starter Kenneth Walker III, DeeJay Dallas, and Darwin Thompson on the roster.

What the team needs in an RB now is a change-of-pace back who can catch passes on 3rd-down, and most importantly, an RB who stays healthy.

That’s why Singletary is a great fit on the Seahawks roster.

The former Florida Atlantic is shifty, durable, and has good hands. The 5-foot-7, 203-pound runner has over 800 rushing yards the last two seasons, at least 38 catches, and over 225 receiving yards the last three seasons and has only missed one game since his rookie year.

With the bruising running of a returning Walker, Singletary is the perfect complement in the Seahawks backfield. A player like him can find his own role as the team’s 3rd-down back and take carries away from Walker to save him the wear and tear of plunging into the line 20-plus times a game.

Jon Feliciano, C, New York Giants

Finally! A Seahawks free-agent target not from the Bills. Well, kind of.

Center Jon Feliciano played for Brian Daboll and the New York Giants last season after the former Bills offensive coordinator poached the lineman from their old team. Now, Feliciano is 31 and a free agent, and it looks as though the G Men might be moving on.

On the other side of the country, the Seahawks' roster desperately needs a new center. The team signed former Detroit Lions G/C Evan Brown in NFL free agency this offseason, and they will likely draft a center as well.

However, if Brown is a better fit at guard and the young snapper isn’t ready in Week 1, having a veteran like Feliciano would be great for the Seahawks. And, if he is ready or Brown takes the role in the middle of the line, Feliciano has also played guard for a good chunk of his career and can slot in there as a backup or a starter.

Feliciano is versatile and experienced and has spent the last four seasons helping young O-lines come together in Buffalo and New Jersey. With second-year tackles Charles Cross and Abraham Lucas coming back and a new interior line evolving, Feliciano is the perfect leader to help the unit gel into one of the best in the league this NFL offseason.