The Seahawks added defensive end Pita Taumoepenu on Sunday, a move that adds defensive line depth with Branden Jackson going on injured reserve.

Taumoepenu, who was a sixth-round pick out of Utah by the 49ers in 2017, appeared in six games over two seasons with San Francisco, recording three tackles. He spent part of last season on Seattle's practice squad.

At Utah, Taumoepenu recorded 21 sacks, 25.5 tackles for loss, four forced fumbles and 73 total tackles over four seasons, including nine sacks and 12 tackles for loss as a senior.

Jackson has appeared in 36 games for Seattle over the past three seasons, including 15 games last year when he had a career-best two sacks. Jackson was knocked unconscious during a scrimmage earlier this month at CenturyLink Field and had to leave the field in an ambulance.

Jackson was back with the team a couple of days later and able to attend meetings, but did not return to practice. Asked about Jackson last week, Seahawks coach Pete Carroll said, "There's some concerns that they're going to check out to make sure we're really clear on, so it's going to take us little bit of time. We're going to be very deliberate about taking time. Any time you get hit in the head like that, we've got to make sure we take all of the time that it takes and all of the considerations. There's a lot of stuff we're going to check him out on. We want to make sure he's OK."