SEATTLE — The Seahawks acquiring defensive lineman Roy Robertson-Harris from the Jacksonville Jaguars in exchange for a sixth-round pick in 2026, the team announced Monday.

The trade will become official when the 31-year-old Robertson-Harris passes a physical with the Seahawks.

The Seahawks made what is first trade of the NFL regular season — and the trade deadline 22 days away — with an eye toward adding depth to their defensive line, and specifically improving what has been a leaky run defense of late.

Seattle ranks 28th in the NFL in rushing yards allowed per carry at 5.0 — which is also on track to be the worst in team history — after the games Sunday.

Robertson-Harris, listed at 6-foot-5, 290 pounds, played at UTEP before entering the NFL in 2016 as an undrafted free agent with the Bears.

He spent four years with the Bears and the last four with the Jaguars. He has played in 106 games with 62 starts, including playing in all six this year with two starts, having made seven tackles with four QB hits. He started all 17 games for the Jags in 2022 and 2023.

Robertson-Harris has played 210 snaps for the Jags this year, 140 coming on passing downs, 65 on running downs, according to Pro Football Focus, making seven tackles with two sacks, one in Sunday's loss to the Bears in London.

He has a 52.2 run defense grade this year from PFF but last year 73.9, his best.

The Seahawks are thought to view Robertson-Harris as being able to play anywhere on the defensive line, mostly in down positions at tackle and end, and at times standing up as an edge rusher.

The Seahawks have found themselves short-handed up front much of the past month with first-round pick Byron Murphy II missing the last three games with a hamstring injury and veteran standout Leonard Williams missing the Detroit game with a rib injury.

The Seahawks are optimistic that Murphy can return for Sunday's game at Atlanta, and the addition of Robertson-Harris isn't thought to be a reaction to concern over Murphy's availability.

The Seahawks got back second-year tackle Cameron Young last week after he missed all of the offseason and training camp with a knee injury.

Young appears to need some time to get back into full game shape as he played just two snaps against the 49ers.

The injuries have meant more playing time for the likes of second-year defensive lineman Mike Morris and Myles Adams.

Robertson-Harris now adds another proven and experienced option to that miss on the defensive front.

Robertson-Harris signed a three-year, $21.6 million contract with Jacksonville in February of 2023. That contract runs through the 2026 season and includes a cap hit for this year of $4.8 million. That deal includes $1.7 million in base salary, and the Seahawks will take on a prorated share of that salary.

Robertson-Harris's deal includes base salaries of $5.6 million in 2025 and $5.8 million in 2026. But neither is guaranteed, and there is no more guaranteed money in his contract, via OvertheCap.com. It does include a hefty dead cap hit of $7.7 million in 2025 with a $1.2 million cap savings. So that could indicate the team planning on him being part of the team in 2025.

Robertson-Harris is with Jacksonville in London, where the Jags played the Bears on Sunday and will play the Patriots Sunday. So he had to travel back from London before he could take his physical and start practicing with the Seahawks.

The Seahawks are returning to practice Monday afternoon from their mini-bye.

Seahawks activate Reed, re-sign Curtis

The Seahawks made two other moves Monday, designating safety Jerrick Reed II as returning to practice off the Physically Unable to Perform list and re-signing offensive lineman McClendon Curtis to the practice squad.

Reed, a sixth-round pick in 2023 out of New Mexico, ranked third on the team in special teams tackles last year with nine despite missing the final seven games with an ACL injury suffered in a game against the Rams in Los Angeles.

That means Reed can practice for 21 days before the team has to place him on the 53-man roster or keep him on the PUP list. That means the team could wait until after its bye the week of Nov. 10 to make that call.

The move with Reed means only one player remains on the PUP list — right tackle Abraham Lucas. There remains no clear ETA when the third-year player out of Washington State may return as he continues to rehab from knee surgery in January.

Curtis was waived Thursday when Seattle signed cornerback Artie Burns off the practice squad to the 53-man roster.

(c)2024 The Seattle Times Distributed by Tribune Content Agency, LLC.