Jackson (hamstring) was placed on injured reserve Tuesday.

EDGE Analysis

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 did not return to Sunday's overtime loss to the Colts, Matt Maiocco of NBC Sports Bay Area reports.

EDGE Analysis

The 49ers' injury woes in the secondary continued Sunday with Jackson and Ahkello Witherspoon (concussion) both exiting with injuries.

Jackson was signed to the 49ers 53-man roster Saturday, Matt Maiocco of NBC Sports Bay Area reports.

EDGE Analysis

Jackson has resided on the 49ers practice squad since being released at roster cutdowns, and now takes the roster spot 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.

EDGE Analysis

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.

EDGE Analysis

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.

EDGE Analysis

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.

EDGE Analysis

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.

EDGE Analysis

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.

EDGE Analysis

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.

EDGE Analysis

Jackson was among the cuts by Arizona's front office in order to reach the 75-man threshold. The four-year veteran could very well latch on elsewhere as depth to another secondary.