The Seattle Seahawks rounded out the final day of the 2013 NFL draft by selecting nine players, including a hard-hitting running back, a physical receiver and versatile linemen on both sides of the ball.

But the key question for Seattle’s latest additions will be: Can they crack the lineup on a team that has been rated as one of the best rosters in the NFL?

“It’s going to be an extremely competitive camp,” Seattle coach Pete Carroll said. “Every step of the way, including the Phase 2 element that we’re in now, OTAs (organized team activities) – everything that we go through is competitive for these kids to figure out how they can best position themselves to make this club.

“It’s very, very exciting in that regard.”

The most notable pick for Seattle on Day 3 was 6-foot-31/2, 323-pound Alabama defensive tackle Jesse Williams. Projected to go in the first two rounds, Williams fell all the way to the fifth, where Seattle gobbled him up with the team’s No. 137 overall selection, trading up for the first time in general manager John Schneider’s tenure in Seattle with Detroit.

The Seahawks gave up picks in the fifth (pick No. 165 overall) and sixth (199) rounds – which they got in a trade with Baltimore on Friday – to make the move.

Williams, a Brisbane, Australia, native, had a feeling he might fall down the draft board, but is grateful to be headed to Seattle.

“I had high hopes, but I was also being realistic,” Williams said. “Like I said, I’m happy to wait as long as I needed to get to a good team, and somewhere I can

contribute and help out right away.”

Williams will compete for time as an early-down run stuffer, the role Alan Branch held for two years.

“He’s really intense, jumps off the ball and is strong,” Schneider said. “I think he benches 600-something pounds. He’s a guy who will really fill a specific role for us. Just his strength, his movement down the line of scrimmage and his ability to compress the pocket really is an intriguing thing for us.”

With the team’s first pick Saturday, in the fourth round, Seattle selected receiver Chris Harper.

A former quarterback converted to receiver, the 6-01/2 Harper is thick at 233 pounds. He finished with 58 catches for 857 yards in Kansas State’s run-oriented offense last season. Carroll said that Harper will compete for time as an outside receiver behind Golden Tate.

“He’s a very tough, physical kid,” Carroll said about Harper. “We really like that element that he brings that’s different from the rest of our guys.”

Like second-round selection Christine Michael, the Seahawks also picked up a few players who carry with them some off-the-field issues.

LSU cornerback Tharold Simon, picked one spot behind Williams at No. 138, was arrested in his hometown of Eunice, La., on Thursday and charged with public intimidation, resisting arrest and unnecessary noise when he got into an altercation with a police officer who asked him to move his parked car off the road.