The Panthers waived Matthews on Monday, Mike Kaye of The Charlotte Observer reports.
Matthews was signed from the practice squad to the 53-man roster Tuesday, Mike Kaye of The Charlotte Observer reports.
Carolina signed Matthews to its practice squad Wednesday, Darin Gantt of the Panthers' official site reports.
Matthews (knee) tried out with the Panthers on Tuesday, Mike Kaye of The Charlotte Observer reports.
The 49ers placed Matthews (knee) on the Injured Reserve list.
Matthews suffered a torn ACL on Monday and will be placed on injured reserve, Cam Inman of The San Jose Mercury News reports.
The 49ers signed Matthews to a reserve/future contract Wednesday, Jennifer Lee Chan of NBC Sports Bay Area reports.
Matthews has been elevated from the practice squad ahead of Sunday's tilt with the Bears, Matt Maiocco of NBC Sports Bay Area reports.