Charlton (undisclosed) was placed on injured reserve by the 49ers on Saturday, Eric Branch of the San Francisco Chronicle reports.
Charlton has been waived by the Bears, Brendan Sugrue of USA Today reports.
Chicago signed Charlton off the Saints' practice squad Wednesday, Kevin Fishbain of The Athletic reports.
The Saints signed Charlton on Tuesday, Nick Underhill of NewOrleans.Football reports.
Charlton is expected to replace the injured T.J. Watt (hip) as a starter on the edge during Sunday's game against the Chargers, Chris Adamski of TribLive.com reports.
Charlton was released by the Chiefs on Monday.
Charlton (leg) re-signed with the Chiefs on a one-year contract Tuesday, Tom Pelissero of NFL Network reports.
The Chiefs placed Charlton (lower leg) on injured reserve Saturday.
Charlton (lower leg) underwent surgery on his fractured right leg earlier this week, Nate Taylor of The Athletic reports.
Charlton fractured his right leg during Sunday's win over the Panthers, Nate Taylor of The Athletic reports.