Jackson (hamstring) was placed on injured reserve Tuesday.
Jackson played just one defensive snap this season, as he was relegated mainly to special teams duties, so his departure shouldn't affect fantasy owners. The 49ers replaced Jackson's roster vacancy with the signing of 32-year-old cornerback Leon Hall.
Jackson sustained a hamstring injury and didn't return to Sunday's overtime loss to the Colts, Matt Maiocco of NBC Sports Bay Area reports.
The 49ers' injury woes in the secondary continued Sunday with Jackson and Ahkello Witherspoon (concussion) both exiting with injuries. The health of both players should become clearer once the 49ers resume practicing Wednesday.
Jackson was added to the 49ers' 53-man roster Saturday, Matt Maiocco of NBC Sports Bay Area reports.
Jackson has resided on the 49ers practice squad since being released at roster cutdowns, and now takes the roster spot of cornerback Keith Reaser. The 27-year-old will likely serve as a depth cornerback but could also have some opportunities on special teams.
Jackson signed with the 49ers on Tuesday, Nick Wagoner of ESPN.com reports.
Jackson bounced around and never really found a home last season, only playing in four games and recording seven tackles. He was likely brought in to add more competition for San Fran's defensive backs with an opportunity to win a specialist job.
Jackson (ankle) was placed on injured reserve Tuesday, Tim Twentyman of the Lions' official site reports.
Jackson suffered an ankle injury in Sunday's loss to the Packers and will now miss the Lions' playoff run. In four games with the team, the cornerback recorded seven tackles and one pass deflection. The Lions promoted Adairius Barnes from the practice squad to replace Jackson on the depth chart.
Jackson (ankle) is questionable to return to Sunday's game against the Packers, Tim Twentyman of the Lions' official site reports.
Unless Jackson returns, the Lions will be left with just four corners for the remainder of the game.
Jackson signed a contract with the Lions on Tuesday, Mike Garafolo of NFL Network reports.
After placing cornerback Quandre Diggs on injured reserve, the Lions decided to bring Jackson in from the Ravens' practice squad to help bolster the secondary. The 27-year-old has yet to take the field this season.
Jackson was waived by the Ravens on Saturday, Jamison Hensley of ESPN reports.
Jackson was waived after the team added tight end Nick Boyle to their active roster, as he was returning from suspension. Jackson was waived by the team in the preseason, but was promoted from the practice squad to the active roster prior to Week 11. He presumably will end up back on the practice squad if he clears waivers.
Jackson was promoted to the active roster Tuesday.
Jackson has been on the Ravens' practice squad since mid-October, so the defensive back should have a good understanding of the defensive. However, the 26-year-old could make a more immediate impact on special teams as he has proven his return capabilities throughout the preseason.
Jackson (foot) was released by the Cardinals on Monday, Mike Jurecki of FOX Sports 910 Phoenix reports.
Jackson was among the cuts Arizona's front office made in order to reach the 75-man threshold. The four-year veteran could very well latch on elsewhere.
Jackson (foot) won't suit up for Friday's preseason game against the Raiders, the Cardinals' official site reports.
Stalwarts of the secondary like Patrick Peterson (ankle) and Justin Bethel (foot) entered training camp with injury concerns, opening the door for reserve DBs to stake a claim to a role. While rookie Brandon Williams has done just that, Jackson was listed as a third-stringer on the Cardinals' first unofficial depth chart. The injury may have played a part, but Jackson will have to show in the three remaining exhibitions in order to land on the 53-man roster.
Jackson was signed by the Ravens on Tuesday.
Selected by the Ravens in the fifth round of the 2012 NFL Draft, Jackson was suspended twice during his first stint in Baltimore, and he failed to make the final roster this year. With the team once again desperate for help at cornerback, Jackson might actually see the field in Week 6. He's shown some promise as a return man, but his work as a cornerback has been far from impressive.
Defensive tackle Louis Nix and cornerback Asa Jackson did not have a long tenure with the Giants. Two days after being claimed off waivers, the Giants announced they waived both players Tuesday.
The Giants were awarded cornerback Asa Jackson and defensive tackle Louis Nix off waivers Sunday, reports NJ.com. Jackson was recently released by the Ravens, while Nix was cut by the Texans.
Cornerback Asa Jackson and offensive lineman Jah Reid were among the players cut by the Ravens on Saturday, the team announced.
The Ravens announced they put rookie running back Lorenzo Taliaferro (foot), safety Terrence Brooks (knee) and cornerback Asa Jackson (knee) on injured reserve.
The Ravens announced cornerback Asa Jackson is out for the season with a knee injury.
Jackson sustained posterior cruciate ligament damage to his knee during the Ravens’ win over the Jaguars Sunday. Jackson left the game and did not return.
Ravens coach John Harbaugh said the team would explore their options for suitable replacements.
A right knee injury has knocked Ravens cornerback Asa Jackson out of the game Sunday against Jacksonville. He will not return.
The Ravens have announced a pair of roster moves prior to Sunday's game against Miami, per the team's official website. Baltimore placed cornerback Tramain Jacobs on injured reserve because of a thigh injury, ending his 2014 campaign. In a corresponding move, cornerback Asa Jackson (toe) was activated to the 53-man active roster and should be available to play Week 14.
Ravens coach John Harbaugh told reporters he remains optimistic cornerback Asa Jackson will be able to return this week. Jackson was placed on the short-term injured reserve after suffering a severe toe sprain on Oct. 5. He's eligible to return Week 14 against Miami.