The Cardinals released Walker on Monday, Darren Urban of the team's official site reports.

EDGE Analysis

Walker spent three of his first five NFL seasons in Arizona, and aside from 2019, operated mostly on special teams. The 29-year-old linebacker will have to look for a new NFL opportunity ahead of Week 1, but it's unclear how much attention he'll receive as a free agent.

Walker was elevated to the main roster as a COVID replacement for running back Jonathan Ward, Aaron Wilson of Sportstalk 790 Houston reports.

EDGE Analysis

Walker has been active for seven games this season for the Cardinals, mostly seeing action on special teams. The five-year-pro hasn't played a significant role since 2019 and will likely serve as emergency linebacker depth and a contributor on special teams, if he suits up Monday against the Rams.

The Football Team released Walker on Monday, Ben Standig of The Athletic reports.

EDGE Analysis

Walker appeared in 12 games for the 49ers last season, in which span he notched six tackles while mostly contributing on special teams. He could resurface with a similar role elsewhere in the league.

Walker (undisclosed) is active for San Francisco's Week 12 matchup at the Rams.

EDGE Analysis

Walker spent nine days on the reserve/COVID-19 list between Nov. 19 and Nov. 28, but he didn't have to miss any game action with San Francisco taking its bye over Week 12. Because of Demetrius Flannigan-Fowles (hamstring) being ruled out for Sunday's contest, Walker is in line to get the start at weakside linebacker.

Walker (undisclosed) was activated from the reserve/COVID-19 list Saturday and is questionable for Sunday's game against the Rams, Matt Barrows of The Athletic reports.

EDGE Analysis

The 27-year-old landed on the COVID-19 during San Francisco's bye week, but he may not end up missing a game. Walker has played only 14 offensive snaps in six games this season, so he's unlikely to be significantly involved defensively, even if he suits up Sunday.

The 49ers placed Walker on the reserve/COVID-19 list Thursday.

EDGE Analysis

It's unclear whether Walker tested positive for the virus, or came into close contact with someone who did. The good news is that the 49ers enter their bye week in Week 11, so he'll have a few extra days to clear through the league's protocols before being granted clearance to return.

The 49ers signed Walker to the active roster Wednesday.

EDGE Analysis

Walker has been on the 49ers' practice squad this season, and he's been elevated to the active roster twice. The 27-year-old linebacker now has some security on the 53-man roster. He likely won't play much on defense barring an injury, but it's noteworthy that Kwon Alexander is dealing with an ankle injury. If Alexander misses time, Walker could log a handful of snaps.

The 49ers elevated Walker to the 53-man roster from the practice squad Sunday.

EDGE Analysis

With Dre Greenlaw nursing a quadriceps injury and out for Week 3, San Francisco elected to go with in-house reinforcements. Walker was solid for the Cardinals in 2019, racking up 65 tackles (41 solo) and a forced fumble across all 16 games in that span.

Walker was waived by the 49ers on Saturday.

EDGE Analysis

Walker started 11 games in Arizona last season and recorded 65 tackles, but trying out with the dominant 49ers defense is a different story. While he couldn't make the cut with them, the 27-year-old stands a good chance to make another roster in a reserve role.

The 49ers and Walker agreed to a one-year contract Monday, Tom Pelissero of NFL Network reports.

EDGE Analysis

Walker kicked off last season primarily as a special-teamer but eventually took over for Haason Reddick at inside linebacker, notching 56 tackles and one forced fumbled over the final nine games. In San Francisco, Walker will be behind a formidable LB trio of Fred Warner, Dre Greenlaw and Kwon Alexander (biceps), likely relegating him to special teams yet again with the chance to elevate in the event of an injury.